v3.26.1
Interim Financial Information - Reconciliation of Segment Net Loss to Consolidated Net Loss (Detail) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]            
Revenues $ 458,439   $ 134,599   $ 645,423 $ 134,599
Total stock-based compensation 176,767   204,897   584,528 490,840
Total operating expenses 2,999,628   3,741,691   6,022,418 6,944,201
Operating loss (2,541,189)   (3,607,092)   (5,376,995) (6,809,602)
Interest income 231,931   324,955   484,895 661,066
Other income (expense), net (4,881)   952   (8,297) 3,231
Net loss (2,314,139) $ (2,586,258) (3,281,185) $ (2,864,120) (4,900,397) (6,145,305)
Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense            
Segment Reporting [Line Items]            
Total stock-based compensation 115,926   132,815   369,139 294,567
Location, Statement of Income, Balance [Axis]: mnov:ResearchDevelopmentAndPatentsExpense            
Segment Reporting [Line Items]            
Total stock-based compensation 60,841   72,082   215,389 196,273
Operating Segment | Reporting Segment            
Segment Reporting [Line Items]            
Revenues 458,439   134,599   645,423 134,599
Total operating expenses, excluding stock-based compensation 2,822,861   3,536,794   5,437,890 6,453,361
Total stock-based compensation 176,767   204,897   584,528 490,840
Total operating expenses 2,999,628   3,741,691   6,022,418 6,944,201
Operating loss (2,541,189)   (3,607,092)   (5,376,995) (6,809,602)
Interest income 231,931   324,955   484,895 661,066
Other income (expense), net (4,881)   952   (8,297) 3,231
Net loss (2,314,139)   (3,281,185)   (4,900,397) (6,145,305)
Operating Segment | Reporting Segment | Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense            
Segment Reporting [Line Items]            
Total operating expenses, excluding stock-based compensation 1,713,858   1,303,875   3,050,820 2,504,831
Total stock-based compensation 115,926   132,815   369,139 294,567
Operating Segment | Reporting Segment | Location, Statement of Income, Balance [Axis]: us-gaap:SellingExpense            
Segment Reporting [Line Items]            
Total operating expenses, excluding stock-based compensation 140,680   116,349   310,781 116,349
Operating Segment | Reporting Segment | Location, Statement of Income, Balance [Axis]: mnov:ResearchDevelopmentAndPatentsExpense            
Segment Reporting [Line Items]            
Total operating expenses, excluding stock-based compensation 968,323   2,116,570   2,076,289 3,832,181
Total stock-based compensation $ 60,841   $ 72,082   $ 215,389 $ 196,273