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Share-Based Payment Arrangements (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Details of Stock Option Plan
The following table summarizes the 2018 Plan, which was the only plan under which the Company was able to grant equity compensation as of December 31, 2021: 
    
Name of PlanShares
Authorized		Shares Available
for Grant		Shares
Outstanding
FalconStor Software, Inc. 2018 Incentive Stock Plan1,692,79782,8171,513,380
Schedule of Equity Awards Outstanding The following table summarizes the Company’s equity plans that have expired but that still have equity awards outstanding as of December 31, 2021:
Name of PlanShares Available for GrantShares Outstanding
FalconStor Software, Inc., 2016 Incentive Stock Plan—2,250
FalconStor Software, Inc., 2006 Incentive Stock Plan—3,440
Schedule of Stock Option Activity
A summary of the Company’s stock option activity for 2021 is as follows: 
Number of
Options		Weighted
Average
Price		Weighted
Average
Remaining
Contractual
Life (Years)		Aggregate
Intrinsic
Value
Options Outstanding at December 31, 20209,780 $113.66 4.25$— 
Granted— $—   
Exercised— $—   
Forfeited(3,950)$108.28   
Expired(140)$409.79   
Options Outstanding at December 31, 20215,690 $110.10 3.28$— 
Options Exercisable at December 31, 20215,690 $110.10 3.28$— 
Options Expected to Vest after December 31, 2021— $— 0.00$— 
Schedule of Share Based Compensation Recognized
The following table summarizes the share-based compensation expense for all awards issued under the Company’s stock equity plans in the following line items in the consolidated statements of operations:
 Years ended December 31,
 20212020
Cost of revenue - Support and Service1,656 496 
Research and development costs2,088 942 
Selling and marketing11,812 785 
General and administrative5,622 13,532 
 $21,178 $15,755 
Stock Based Compensation Expense - Restricted Stock A summary of the total stock-based compensation expense related to restricted stock units, which is included in the Company’s total share-based compensation expense for each respective year, is as follows: 
 Years ended December 31,
 20212020
Directors, officers and employees$21,178 $15,755 
Schedule of Restricted Stock Units Activity
A summary of the Company’s restricted stock activity for 2021 is as follows: 
 Number of Restricted Stock Awards
Non-Vested at December 31, 20201,386,213 
Granted163,230 
Vested(36,063)
Forfeited— 
Non-Vested at December 31, 20211,513,380