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Employee Stock and Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Total Stock-based Compensation Expense Stock-based compensation expense recognized in our consolidated statements of operations includes amounts related to stock options and restricted stock, and was as follows (in thousands):
 Years Ended December 31,
 20212020
Total stock-based compensation expense$4,224 $1,420 
Weighted-Average Assumptions Used to Determine Fair Value of Options Granted The fair value of options granted used the following weighted average assumptions:
 Years ended December 31,
 20212020
Expected dividend yield— %— %
Risk-free interest rate0.59 %0.37 %
Expected term (years)3.94.8
Volatility71 %45 %
Schedule of Nonvested Restricted Stock Units Activity Restricted stock unit and award activity was as follows (shares are in thousands):
Number of SharesWeighted Average Grant Date Fair Value Per ShareTotal Grant Date Fair Value of Vested Awards (000's)
Nonvested shares, December 31, 2019845 $2.24 
Granted1,446 1.49 
Vested(218)1.89 $412 
Forfeited/Canceled(270)2.38 
Nonvested shares, December 31, 20201,803 $1.65 
Granted886 2.26 
Vested(392)2.38 $933 
Forfeited/Canceled(211)2.00 
Nonvested shares, December 31, 20212,086 $1.74 
Schedule of Stock Options and Restricted Stock Units Activity Stock option activity (shares are in thousands):
 Options OutstandingWeighted Average Grant Date Fair Value
Number
of Shares
Weighted
Average
Exercise Price
Outstanding, December 31, 20197,471 $4.25 
Options granted at common stock price2,382 1.26 $0.47 
Options exercised— — 
Options canceled(3,354)4.59 
Outstanding, December 31, 20206,499 $2.97 
Options granted at common stock price1,737 2.13 $1.12 
Options exercised(258)2.07 
Options canceled(1,499)3.77 
Outstanding, December 31, 20216,479 $2.60 
Exercisable, December 31, 20213,276 $3.33 
Vested and expected to vest, December 31, 20215,149 $2.80