The Company recognizes stock-based compensation in accordance with the provisions of ASC Topic 718, Compensation-Stock Compensation. Stock-based compensation expense was $432 and $721, excluding $2 and $1 of compensation expense related to our Amended and Restated 1996 Employee Stock Purchase Plan, or the ESPP, for the three months ended June 30, 2025 and 2024, respectively, and $767 and $1,238, excluding $4 and $6 of compensation expense related to ESPP, for the six months ended June 30, 2025 and 2024, respectively. As of June 30, 2025, there was $1,808 of total unrecognized compensation expense related to stock options, which is expected to be recognized over a weighted-average period of 3.12 years. As of June 30, 2025, there was $935 of total unrecognized compensation expense related to restricted stock awards, which is expected to be recognized over a weighted-average period of 2.06 years.

During the three months ended June 30, 2025, 6 shares of common stock were issued upon the exercise of stock options. No shares were surrendered to the Company to satisfy minimum tax withholding obligations. Additionally, during the three months ended June 30, 2025, 50 stock options were granted and 64 stock options expired, were canceled or were forfeited. During the three months ended June 30, 2024, no shares of common stock were issued upon the exercise of stock options. No shares were surrendered to the Company to satisfy minimum tax withholding obligations. Additionally, during the three months ended June 30, 2024, no stock options were granted and 257 stock options expired, were canceled or were forfeited.

During the six months ended June 30, 2025, 6 shares of common stock were issued upon the exercise of stock options. No shares were surrendered to the Company to satisfy minimum tax withholding obligations. Additionally, during the six months ended June 30, 2025, 575 stock options were granted and 127 stock options expired, were canceled or were forfeited. During the six months ended June 30, 2024, no shares of common stock were issued upon the exercise of stock options. No shares were surrendered to the Company to satisfy minimum tax withholding obligations. Additionally, during the six months ended June 30, 2024, 266 stock options were granted and 271 stock options expired, were canceled or were forfeited. The Company has historically estimated the fair value of each option grant on the date of grant using the Black-Scholes option-pricing model. The weighted average assumptions utilized to determine the fair value of options granted during the six months ended June 30, 2025 and 2024 are as follows:

As of June 30, 2025, there were 1,397 options outstanding with a weighted average exercise price of $7.19 per share and 510 options exercisable with a weighted average exercise price of $8.96 per share. As of June 30, 2024, there were 1,225 options outstanding with a weighted average exercise price of $8.64 per share and 599 options exercisable with a weighted average exercise price of $9.84 per share.

During the three months ended June 30, 2025, no shares of restricted stock were granted and 1 shares of restricted stock were forfeited. Additionally, during the three months ended June 30, 2025, 63 shares of restricted stock vested. During the three months ended June 30, 2024, no shares of restricted stock were granted and 35 share of restricted stock were forfeited. Additionally, during the three months ended June 30, 2024, 76 shares of restricted stock vested.

During the six months ended June 30, 2025, no shares of restricted stock were granted and 22 shares of restricted stock were forfeited. Additionally, during the six months ended June 30, 2025, 146 shares of restricted stock vested. During the six months ended June 30, 2024, 122 shares of restricted stock were granted with a weighted average grant date fair value of $5.03 per share and 43 shares of restricted stock were forfeited. Additionally, during the six months ended June 30, 2024, 142 shares of restricted stock vested.

The Company's ESPP affords eligible employees the right to purchase common stock, via payroll deductions, through various offering periods at a purchase price equal to 85% of the fair market value of the common stock on the first or last day of the offering period, whichever is lower. During the three months ended June 30, 2025 and 2024, no shares were issued under the ESPP. During the six months ended June 30, 2025 and 2024, 0 and 24 shares were issued under the ESPP, respectively. The Company recorded compensation charges related to the ESPP of $2 and $1 for the three months ended June 30, 2025 and 2024, respectively, and $4 and $6 for the six months ended June 30, 2025 and 2024, respectively.

The following table presents stock-based compensation expense, including expense for the ESPP, in the Company's consolidated statements of operations for the six months ended June 30, 2025 and 2024, respectively:


	Three Months Ended June 30,				Six Months Ended June 30,
	2025		2024		2025		2024
Cost of service sales	$	6	$	7	$	13	$	14
Cost of product sales	5		5		10		14
Research and development	41		174		(8)		263
Sales, marketing and support	77		74		154		145
General and administrative	305		462		602		808
	$	434	$	722	$	771	$	1,244

Comprehensive income (loss) includes net income (loss), unrealized gains and losses from foreign currency translation, and unrealized gains and losses on available for sale marketable securities. The components of the Company’s comprehensive income (loss) and the effect on earnings for the periods presented are detailed in the accompanying consolidated statements of comprehensive income (loss).




	Foreign Currency Translation		Total Accumulated Other Comprehensive Loss
Balance, March 31, 2025	$	(3,310)	$	(3,310)
Other comprehensive income	278		278
Net other comprehensive income	278		278
Balance, June 30, 2025	$	(3,032)	$	(3,032)




	Foreign Currency Translation		Total Accumulated Other Comprehensive Loss
Balance, March 31, 2024	$	(3,956)	$	(3,956)
Other comprehensive loss	(35)		(35)

Net other comprehensive loss	(35)		(35)
Balance, June 30, 2024	$	(3,991)	$	(3,991)



	Foreign Currency Translation		Total Accumulated Other Comprehensive Loss
Balance, December 31, 2024	$	(4,032)	$	(4,032)
Other comprehensive income	1,000		1,000
Net other comprehensive income	1,000		1,000
Balance, June 30, 2025	$	(3,032)	$	(3,032)



	Foreign Currency Translation		Total Accumulated Other Comprehensive Loss
Balance, December 31, 2023	$	(4,185)	$	(4,185)
Other comprehensive income	194		194

Net other comprehensive income	194		194
Balance, June 30, 2024	$	(3,991)	$	(3,991)