v3.26.3
Pay vs Performance Disclosure
USD in Thousands
 12 Months Ended
May 31, 2026
USD ($)
USD
May 31, 2025
USD ($)
USD
May 31, 2024
USD ($)
USD
May 31, 2023
USD ($)
USD
May 31, 2022
USD ($)
USD
May 31, 2021
USD ($)
USD
Pay vs Performance Disclosure            
Pay vs Performance Disclosure, Table
Pay Versus Performance
As required by Section 953(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act, and Item 402(v) of Regulation S-K, we are providing the following information about the relationship between executive compensation actually paid and certain financial performance of the Company. For further information concerning the Company’s pay-for-performance philosophy and how the Company aligns executive compensation with the Company’s performance, see “Compensation Discussion and Analysis.” The amounts set forth below in the required table are calculated pursuant to SEC rules but do not represent amounts that have been actually earned or realized by our NEOs.
Fiscal Year
  
Summary
Compensation
Table Total for
the CEO (1)
    
Compensation
Actually Paid
to the CEO (3)(4)
    
Average
Summary
Compensation
Table Total for
Non-CEO
NEOs (2)
    
Average
Compensation
Actually Paid
to the Non-
CEO NEOs (3)(4)
    
Total Shareholder Return (5)
    
Peer Group Total Shareholder Return (5)
    
Net Income
(loss)
(in thousands) (6)
    
Revenue
(in thousands) (7)
  
2026
  
$
6,060,145
    
$
13,687,672
    
$
1,799,117
    
$
7,350,570
    
$
49.65
    
$
56.54
    
$
(36,742
)
  
$
(320,175
)
2025
  
$
5,494,284
    
$
6,807,600
    
$
1,466,609
    
$
4,144,464
    
$
44.12
    
$
42.92
    
$
(33,993
)
  
$
292,498
  
2024
  
$
5,005,971
    
$
971,112
    
$
1,264,817
    
$
656,573
    
$
27.29
    
$
42.92
    
$
(184,350
)
  
$
303,914
  
2023
  
$
3,983,690
    
$
(2,114,483
)
  
$
914,244
    
$
(45,199
)
  
$
40.92
    
$
56.18
    
$
(52,441
)
  
$
338,752
  
2022
  
$
5,659,727
    
$
4,953,581
    
$
1,303,492
    
$
1,233,726
    
$
84.90
    
$
58.92
    
$
(26,547
)
  
$
316,219
  
2021
  
$
4,045,913
    
$
13,883,392
    
$
1,029,527
    
$
2,868,533
    
$
226.44
    
$
124.10
    
$
(31,547
)
  
$
291,010
  
 
(1)
Mr. Clemmer  was the CEO for each of the fiscal years presented.
 
(2)
Non-CEO NEOs for fiscal year 2026 and 2025 were Messrs. Trowbridge, Weiss, and Nighan and Ms. Piccinini.  Non-CEO NEOs for fiscal year 2024 were Messrs. Trowbridge, Nighan, and Campbell  and Ms. Piccinini.   Non-CEO NEOs for fiscal years 2023 and 2022 were Messrs. Trowbridge, Helsel, and Campbell  and Ms. Piccinini.  Non-CEO NEOs for fiscal year 2021 were Messrs. Trowbridge, Helsel, Campbell  and Nighan.
 
(3)
Subtractions from, and additions to, total compensation in the Summary Compensation Table ("SCT") by fiscal year to calculate Compensation Actually Paid ("CAP") are as follows:
   
2026
    
2025
    
2024
    
2023
  
   
CEO
    
Average of Non-CEO NEOs
    
CEO
    
Average of Non-CEO NEOs
    
CEO
    
Average of Non-CEO NEOs
    
CEO
    
Average of Non-CEO NEOs
  
Total Compensation from SCT
  
$
6,060,145
    
$
1,799,117
    
$
5,494,284
    
$
1,466,609
    
$
5,005,971
    
$
1,264,817
    
$
3,983,690
    
$
914,244
  
Subtractions:
                                                                
SCT Value of Stock and Option Awards
  
$
(3,689,866
)
  
$
(803,570
)
  
$
(3,437,078
)
  
$
(734,299
)
  
$
(3,399,217
)
  
$
(592,487
)
  
$
(3,000,774
)
  
$
(454,289
)
Adjustments:
                                                                
Unvested value at year end of equity granted during the covered fiscal year
  
$
6,479,094
    
$
5,126,562
    
$
3,736,553
    
$
3,217,933
    
$
817,462
    
$
226,197
    
$
658,535
    
$
99,697
  
Change from prior year end in fair value of awards granted in any prior fiscal year that are outstanding and unvested at covered year end
  
$
5,284,540
    
$
1,231,890
    
$
1,263,456
    
$
243,529
    
$
(313,264
)
  
$
(42,700
)
  
$
(3,867,465
)
  
$
(612,420
)
Change as of the vesting date (from the end of the prior fiscal year) in fair value of awards granted in any prior fiscal years for which vesting conditions were satisfied at the end of or during the covered fiscal year
  
$
(446,241
)
  
$
(3,430
)
  
$
(249,615
)
  
$
(49,308
)
  
$
(1,139,840
)
  
$
(199,254
)
  
$
111,531
    
$
7,569
  
Compensation Actually Paid
  
$
13,687,672
    
$
7,350,570
    
$
6,807,600
    
$
4,144,464
    
$
971,112
    
$
656,573
    
$
(2,114,483
)
  
$
(45,199
)
   
2022
    
2021
  
   
CEO
    
Average of
Non-CEO
NEOs
    
CEO
    
Average of
Non-CEO
NEOs
  
Total Compensation from SCT
  
$
5,659,727
    
$
1,303,492
    
$
4,045,913
    
$
1,029,527
  
Subtractions:
                                
SCT Value of Stock and Option Awards
  
$
(4,147,712
)
  
$
(687,958
)
  
$
(2,137,451
)
  
$
(357,244
)
Adjustments:
                                
Unvested value at year end of equity granted during the covered fiscal year
  
$
3,289,559
    
$
518,057
    
$
9,414,998
    
$
1,573,581
  
Change from prior year end in fair value of awards granted in any prior fiscal year that are outstanding and unvested at covered year end
  
$
(1,051,502
)
  
$
(189,282
)
  
$
2,574,779
    
$
561,569
  
Change as of the vesting date (from the end of the prior fiscal year) in fair value of awards granted in any prior fiscal years for which vesting conditions were satisfied at the end of or during the covered fiscal year
  
$
1,203,509
    
$
289,417
    
$
(14,847
)
  
$
61,100
  
Compensation Actually Paid
  
$
4,953,581
    
$
1,233,726
    
$
13,883,392
    
$
2,868,533
  
 
(4)
The fair value of each equity award was re-measured on each vesting date and/or year end, as applicable, in accordance with Accounting Standards Codification (ASC) Topic 718.  The assumptions used in the valuation of each type of award are summarized below:

•
Restricted stock units: The fair value of restricted stock units was based on the Company's closing stock price on each measurement date.

•
Non-qualified stock options:  The fair value of non-qualified stock options was determined using a Black-Scholes option pricing model.

•
Performance unit awards:  Performance unit awards are subject to vesting based on the Company's level of attainment of performance targets, as well as a TSR modifier at the end of each performance period that can adjust the aggregate number of shares eligible to vest at the end of the three-year performance period.  The fair value for performance unit awards was determined using a Monte Carlo simulation.
 
(5)
Total shareholder return (TSR) is determined based on the value of an initial fixed investment of $100 in common stock on May 31, 2020, assuming the reinvestment of the dividends.  The TSR peer group comprises the RDG SmallCap Medical Devices Index.
 
(6)
Reflects the dollar amount of net income reported in our audited financial statements for the applicable fiscal year.
 
(7)
GAAP Revenue equals Net Revenue, so no reconciliations are required for fiscal years 2026, 2025, 2024, 2023, 2022 or 2021.  See our 2026 Annual Report on Form 10-K for the year ended May 31, 2026.
         
Company Selected Measure Name Revenue          
Named Executive Officers, Footnote
 
(1)
Mr. Clemmer  was the CEO for each of the fiscal years presented.
 
(2)
Non-CEO NEOs for fiscal year 2026 and 2025 were Messrs. Trowbridge, Weiss, and Nighan and Ms. Piccinini.  Non-CEO NEOs for fiscal year 2024 were Messrs. Trowbridge, Nighan, and Campbell  and Ms. Piccinini.   Non-CEO NEOs for fiscal years 2023 and 2022 were Messrs. Trowbridge, Helsel, and Campbell  and Ms. Piccinini.  Non-CEO NEOs for fiscal year 2021 were Messrs. Trowbridge, Helsel, Campbell  and Nighan.
         
Peer Group Issuers, Footnote
 
(5)
Total shareholder return (TSR) is determined based on the value of an initial fixed investment of $100 in common stock on May 31, 2020, assuming the reinvestment of the dividends.  The TSR peer group comprises the RDG SmallCap Medical Devices Index.
         
PEO Total Compensation Amount $ 6,060,145 $ 5,494,284 $ 5,005,971 $ 3,983,690 $ 5,659,727 $ 4,045,913
PEO Actually Paid Compensation Amount $ 13,687,672 6,807,600 971,112 (2,114,483) 4,953,581 13,883,392
Adjustment To PEO Compensation, Footnote
 
(3)
Subtractions from, and additions to, total compensation in the Summary Compensation Table ("SCT") by fiscal year to calculate Compensation Actually Paid ("CAP") are as follows:
   
2026
    
2025
    
2024
    
2023
  
   
CEO
    
Average of Non-CEO NEOs
    
CEO
    
Average of Non-CEO NEOs
    
CEO
    
Average of Non-CEO NEOs
    
CEO
    
Average of Non-CEO NEOs
  
Total Compensation from SCT
  
$
6,060,145
    
$
1,799,117
    
$
5,494,284
    
$
1,466,609
    
$
5,005,971
    
$
1,264,817
    
$
3,983,690
    
$
914,244
  
Subtractions:
                                                                
SCT Value of Stock and Option Awards
  
$
(3,689,866
)
  
$
(803,570
)
  
$
(3,437,078
)
  
$
(734,299
)
  
$
(3,399,217
)
  
$
(592,487
)
  
$
(3,000,774
)
  
$
(454,289
)
Adjustments:
                                                                
Unvested value at year end of equity granted during the covered fiscal year
  
$
6,479,094
    
$
5,126,562
    
$
3,736,553
    
$
3,217,933
    
$
817,462
    
$
226,197
    
$
658,535
    
$
99,697
  
Change from prior year end in fair value of awards granted in any prior fiscal year that are outstanding and unvested at covered year end
  
$
5,284,540
    
$
1,231,890
    
$
1,263,456
    
$
243,529
    
$
(313,264
)
  
$
(42,700
)
  
$
(3,867,465
)
  
$
(612,420
)
Change as of the vesting date (from the end of the prior fiscal year) in fair value of awards granted in any prior fiscal years for which vesting conditions were satisfied at the end of or during the covered fiscal year
  
$
(446,241
)
  
$
(3,430
)
  
$
(249,615
)
  
$
(49,308
)
  
$
(1,139,840
)
  
$
(199,254
)
  
$
111,531
    
$
7,569
  
Compensation Actually Paid
  
$
13,687,672
    
$
7,350,570
    
$
6,807,600
    
$
4,144,464
    
$
971,112
    
$
656,573
    
$
(2,114,483
)
  
$
(45,199
)
   
2022
    
2021
  
   
CEO
    
Average of
Non-CEO
NEOs
    
CEO
    
Average of
Non-CEO
NEOs
  
Total Compensation from SCT
  
$
5,659,727
    
$
1,303,492
    
$
4,045,913
    
$
1,029,527
  
Subtractions:
                                
SCT Value of Stock and Option Awards
  
$
(4,147,712
)
  
$
(687,958
)
  
$
(2,137,451
)
  
$
(357,244
)
Adjustments:
                                
Unvested value at year end of equity granted during the covered fiscal year
  
$
3,289,559
    
$
518,057
    
$
9,414,998
    
$
1,573,581
  
Change from prior year end in fair value of awards granted in any prior fiscal year that are outstanding and unvested at covered year end
  
$
(1,051,502
)
  
$
(189,282
)
  
$
2,574,779
    
$
561,569
  
Change as of the vesting date (from the end of the prior fiscal year) in fair value of awards granted in any prior fiscal years for which vesting conditions were satisfied at the end of or during the covered fiscal year
  
$
1,203,509
    
$
289,417
    
$
(14,847
)
  
$
61,100
  
Compensation Actually Paid
  
$
4,953,581
    
$
1,233,726
    
$
13,883,392
    
$
2,868,533
  
         
Non-PEO NEO Average Total Compensation Amount $ 1,799,117 1,466,609 1,264,817 914,244 1,303,492 1,029,527
Non-PEO NEO Average Compensation Actually Paid Amount $ 7,350,570 4,144,464 656,573 (45,199) 1,233,726 2,868,533
Adjustment to Non-PEO NEO Compensation Footnote
 
(3)
Subtractions from, and additions to, total compensation in the Summary Compensation Table ("SCT") by fiscal year to calculate Compensation Actually Paid ("CAP") are as follows:
   
2026
    
2025
    
2024
    
2023
  
   
CEO
    
Average of Non-CEO NEOs
    
CEO
    
Average of Non-CEO NEOs
    
CEO
    
Average of Non-CEO NEOs
    
CEO
    
Average of Non-CEO NEOs
  
Total Compensation from SCT
  
$
6,060,145
    
$
1,799,117
    
$
5,494,284
    
$
1,466,609
    
$
5,005,971
    
$
1,264,817
    
$
3,983,690
    
$
914,244
  
Subtractions:
                                                                
SCT Value of Stock and Option Awards
  
$
(3,689,866
)
  
$
(803,570
)
  
$
(3,437,078
)
  
$
(734,299
)
  
$
(3,399,217
)
  
$
(592,487
)
  
$
(3,000,774
)
  
$
(454,289
)
Adjustments:
                                                                
Unvested value at year end of equity granted during the covered fiscal year
  
$
6,479,094
    
$
5,126,562
    
$
3,736,553
    
$
3,217,933
    
$
817,462
    
$
226,197
    
$
658,535
    
$
99,697
  
Change from prior year end in fair value of awards granted in any prior fiscal year that are outstanding and unvested at covered year end
  
$
5,284,540
    
$
1,231,890
    
$
1,263,456
    
$
243,529
    
$
(313,264
)
  
$
(42,700
)
  
$
(3,867,465
)
  
$
(612,420
)
Change as of the vesting date (from the end of the prior fiscal year) in fair value of awards granted in any prior fiscal years for which vesting conditions were satisfied at the end of or during the covered fiscal year
  
$
(446,241
)
  
$
(3,430
)
  
$
(249,615
)
  
$
(49,308
)
  
$
(1,139,840
)
  
$
(199,254
)
  
$
111,531
    
$
7,569
  
Compensation Actually Paid
  
$
13,687,672
    
$
7,350,570
    
$
6,807,600
    
$
4,144,464
    
$
971,112
    
$
656,573
    
$
(2,114,483
)
  
$
(45,199
)
   
2022
    
2021
  
   
CEO
    
Average of
Non-CEO
NEOs
    
CEO
    
Average of
Non-CEO
NEOs
  
Total Compensation from SCT
  
$
5,659,727
    
$
1,303,492
    
$
4,045,913
    
$
1,029,527
  
Subtractions:
                                
SCT Value of Stock and Option Awards
  
$
(4,147,712
)
  
$
(687,958
)
  
$
(2,137,451
)
  
$
(357,244
)
Adjustments:
                                
Unvested value at year end of equity granted during the covered fiscal year
  
$
3,289,559
    
$
518,057
    
$
9,414,998
    
$
1,573,581
  
Change from prior year end in fair value of awards granted in any prior fiscal year that are outstanding and unvested at covered year end
  
$
(1,051,502
)
  
$
(189,282
)
  
$
2,574,779
    
$
561,569
  
Change as of the vesting date (from the end of the prior fiscal year) in fair value of awards granted in any prior fiscal years for which vesting conditions were satisfied at the end of or during the covered fiscal year
  
$
1,203,509
    
$
289,417
    
$
(14,847
)
  
$
61,100
  
Compensation Actually Paid
  
$
4,953,581
    
$
1,233,726
    
$
13,883,392
    
$
2,868,533
  
         
Compensation Actually Paid vs. Total Shareholder Return
(1)
TSR represents the value of a $100 investment in common stock, assuming reinvestment of dividends, as measured at each fiscal year end.
         
Compensation Actually Paid vs. Net Income          
Compensation Actually Paid vs. Company Selected Measure          
Total Shareholder Return Vs Peer Group
(1)
TSR represents the value of a $100 investment in common stock, assuming reinvestment of dividends, as measured at each fiscal year end.
         
Tabular List, Table
Tabular List of Financial Performance Measures
In our assessment, the three most important financial performance measures used to link CAP (as calculated in accordance with the SEC rules) to our NEOs in fiscal year 2026 to the Company's performance were:

 •
Relative TSR values versus the RDG SmallCap Medical Devices Index;

•
EBITDA and EPS; and

•
The Company Selected Measure is Revenue.
         
Total Shareholder Return Amount $ 49.65 44.12 27.29 40.92 84.9 226.44
Peer Group Total Shareholder Return Amount 56.54 42.92 42.92 56.18 58.92 124.1
Net Income (Loss) $ (36,742,000) $ (33,993,000) $ (184,350,000) $ (52,441,000) $ (26,547,000) $ (31,547,000)
Company Selected Measure Amount | USD (320,175) 292,498 303,914 338,752 316,219 291,010
PEO Name Mr. Clemmer Mr. Clemmer Mr. Clemmer Mr. Clemmer Mr. Clemmer Mr. Clemmer
Measure:: 1            
Pay vs Performance Disclosure            
Name Relative TSR values versus the RDG SmallCap Medical Devices Index          
Measure:: 2            
Pay vs Performance Disclosure            
Name EBITDA          
Measure:: 3            
Pay vs Performance Disclosure            
Name EPS          
Measure:: 4            
Pay vs Performance Disclosure            
Name Revenue          
PEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table            
Pay vs Performance Disclosure            
Adjustment to Compensation, Amount $ (3,689,866) $ (3,437,078) $ (3,399,217) $ (3,000,774) $ (4,147,712) $ (2,137,451)
PEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested            
Pay vs Performance Disclosure            
Adjustment to Compensation, Amount 6,479,094 3,736,553 817,462 658,535 3,289,559 9,414,998
PEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested            
Pay vs Performance Disclosure            
Adjustment to Compensation, Amount 5,284,540 1,263,456 (313,264) (3,867,465) (1,051,502) 2,574,779
PEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year            
Pay vs Performance Disclosure            
Adjustment to Compensation, Amount (446,241) (249,615) (1,139,840) 111,531 1,203,509 (14,847)
Non-PEO NEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table            
Pay vs Performance Disclosure            
Adjustment to Compensation, Amount (803,570) (734,299) (592,487) (454,289) (687,958) (357,244)
Non-PEO NEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested            
Pay vs Performance Disclosure            
Adjustment to Compensation, Amount 5,126,562 3,217,933 226,197 99,697 518,057 1,573,581
Non-PEO NEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested            
Pay vs Performance Disclosure            
Adjustment to Compensation, Amount 1,231,890 243,529 (42,700) (612,420) (189,282) 561,569
Non-PEO NEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year            
Pay vs Performance Disclosure            
Adjustment to Compensation, Amount $ (3,430) $ (49,308) $ (199,254) $ 7,569 $ 289,417 $ 61,100