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Stock-Based Compensation - (Tables)
 12 Months Ended
Dec. 31, 2022
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]  
Schedule of total stock-based compensation expense
The Company recognized total stock-based compensation expense during the years ended December 31, 2022 and 2021 as follows (table in thousands):
Year Ended December 31,
20222021
Service based awards:
Restricted stock units$129 $344 
Stock option awards576 1,354 
$705 $1,697 
Performance based awards:
Restricted stock awards$(390)$(390)
Stock option awards— (364)
(390)(754)
Total$315 $943 
Unvested restricted stock awards  
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]  
Schedule of restricted stock award
A summary of the Company’s restricted stock awards during the years ended December 31, 2022 and 2021 is as follows:
Number of SharesWeighted Average
Grant-Date
Fair Value
Unvested at January 1, 202113,345 $62.70 
Forfeited(6,227)$62.70 
Unvested at December 31, 20217,118 62.70 
Forfeited(6,227)— 
Unvested at December 31, 2022891 $62.70 
Unvested restricted stock units  
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]  
Schedule of restricted stock award
A summary of the Company’s service based restricted stock units during the year ended December 31, 2022 and 2021 is as follows:
Number of SharesWeighted Average
Grant-Date
Fair Value
Unvested at January 1, 202124,136 $28.60 
Granted28,186 9.90 
Forfeited(1,073)52.91 
Vested(21,960)24.97 
Unvested at December 31, 202129,289 12.87 
Granted125,000 1.47 
Forfeited(5,774)19.00 
Vested(23,515)11.33 
Unvested at December 31, 2022125,000 $1.47 
Stock option awards - Service based awards  
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]  
Schedule of stock option assumptions
The fair value of the service based stock options granted for the years ended December 31, 2022 and 2021 were based on the following assumptions:
December 31,
20222021
Exercise price
$1.28 - $1.66
$5.94 - $5.94
Expected stock price volatility
76.2% - 78.5%
75.0% - 77.7%
Risk-free interest rate
1.97% - 3.44%
0.47% - 1.30%
Term (years)
5.5 - 6.0
5.5 - 6.0
Schedule of stock options activity A summary of the Company’s service based stock option activity for the years ended December 31, 2022 and 2021 is as follows:
Shares
Underlying
Options		Weighted
Average
Exercise
Price		Weighted
Average
Remaining
Contractual
Term
Aggregate
Intrinsic
Value
(in $1,000's)
Outstanding at January 1, 2021519,814 $50.05 6.6$— 
Granted177,014 9.68 6.0— 
Expired(128,064)(77.00)
Forfeited(40,173)(24.42)— 
Outstanding at December 31, 2021528,591 $32.01 7.5$— 
Granted898,659 1.49 — — 
Expired(96,199)(78.06)— 
Forfeited(124,146)(5.70)— 
Outstanding at December 31, 20221,206,905 $28.31 8.9$— 
Exercisable at December 31, 2022243,088 $4.81 6.8$—