Debt Obligations - Enlightenment Capital Credit Agreement (Details) $ / shares in Units, $ in Thousands							12 Months Ended
	Apr. 19, 2021 USD ($) $ / shares shares	Nov. 24, 2020 USD ($)	Mar. 26, 2020 USD ($) maturity_date_extension	Jul. 19, 2019 USD ($)	Mar. 31, 2018 qtr shares	Jan. 25, 2017 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares	Dec. 31, 2020 USD ($) $ / shares	Dec. 31, 2019 USD ($)	Jul. 18, 2019 USD ($)
Debt Instrument [Line Items]
Class of warrant or right, exercise price of warrants or rights (in dollars per share) | $ / shares							$ 1.665
Number of quarterly maturity date extensions | maturity_date_extension			4
Amount of increase in quarterly exit fee payable			$ 250
Amount of increase in exit fee payable			1,000
Amendment fee and out-of-pocket costs and expenses			$ 100
Repayments of senior debt							$ 0	$ 17,351	$ 0
Loss on debt debt extinguishment							0	(275)	0
Repurchase of outstanding warrants							26,894	0	0
Repurchase of common stock							$ 1,251	$ 0	0
Common stock, par value (in dollars per share) | $ / shares							$ 0.001	$ 0.001
Enlightenment Capital Solutions Fund II LP
Debt Instrument [Line Items]
Long-term line of credit				$ 16,000
Exit fee				$ 1,200						$ 825
Debt instrument, interest rate, effective percentage				17.30%
Line of credit facility, increase (decrease), net				$ 5,000
Prepayment price percentage for January 26, 2019 to January 25, 2020				102.00%
Prepayment price percentage for January 26, 2020 to October 14, 2020				101.00%
Agent fee				$ 110
Stock repurchased during period (in shares) | shares	39,682
Repurchase of outstanding warrants	$ 26,900
Repurchase of common stock	$ 1,300
Warrants acquired, average cost per share (in dollars per share) | $ / shares	$ 29.85
Treasury stock acquired, average cost per share (in dollars per share) | $ / shares	31.51
Common stock, par value (in dollars per share) | $ / shares	$ 0.001
Credit Agreement
Debt Instrument [Line Items]
Exit fee		$ 1,200					$ 825
Debt instrument, interest rate, effective percentage							15.00%
Credit agreement transaction costs							$ 374
Increase in interest rate					1.00%
Number of consecutive quarters | qtr					2
Repayments of senior debt		17,400
Accrued interest		138
Legal fees		13
Loss on debt debt extinguishment		$ 138
Interest expense								$ 2,700	$ 2,200
Class A Common Stock | Enlightenment Capital Solutions Fund II LP
Debt Instrument [Line Items]
Class of warrant or right, number of securities called by warrants or rights (in shares) | shares						900,970
Percentage of warrants issued of common equity interests						2.50%
Class of warrant or right, exercise price of warrants or rights (in dollars per share) | $ / shares						$ 1.665
Class A Common Stock | Credit Agreement | Emmett Wood
Debt Instrument [Line Items]
Number of shares held by Chief Executive Officer (in shares) | shares					50,000
Term Loan | Enlightenment Capital Solutions Fund II LP
Debt Instrument [Line Items]
Long-term line of credit						$ 11,000
Debt instrument, interest rate, stated percentage						13.00%