Current Liabilities and Debt Obligations, Enlightenment Capital Credit Agreement (Details)								12 Months Ended
	Nov. 24, 2020 USD ($)	Mar. 26, 2020 USD ($) Extension	Jul. 19, 2019 USD ($)	Jul. 18, 2019 USD ($)	Mar. 31, 2018 qtr shares	Jan. 25, 2017 USD ($) $ / shares shares	Mar. 31, 2015	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($)
Accounts Payable and Other Accrued Payables [Abstract]
Trade account payables								$ 14,700,000	$ 13,600,000
Accrued liabilities								$ 6,200,000	$ 1,500,000
Enlightenment Capital Credit Agreement [Abstract]
Warrants exercise price (in dollars per share) | $ / shares								$ 1.665	$ 1.665
Repayment of debt								$ 17,351,000	$ 0	$ 0
Loss on debt debt extinguishment								(275,000)	0	0
Number of quarterly maturity date extensions | Extension		4
Amount of increase in quarterly exit fee payable		$ 250,000
Amount of increase in exit fee payable		1,000,000
Amendment fee and out-of-pocket costs and expenses		$ 100,000
Credit Agreement [Member]
Enlightenment Capital Credit Agreement [Abstract]
Increase in interest rate					1.00%
Credit agreement exit fee	$ 1,200,000							$ 825,000
Effective interest rate								15.00%
Credit agreement transaction costs								$ 374,000
Number of consecutive quarters | qtr					2
Interest expense								2,700,000	$ 2,200,000	$ 1,700,000
Repayment of debt	17,400,000
Exit fee	1,200,000							$ 825,000
Accrued interest	138,000
Legal fees	13,000
Loss on debt debt extinguishment	$ 138,000
Class A Common Stock [Member]
Enlightenment Capital Credit Agreement [Abstract]
Common stock, par value (in dollars per share) | $ / shares									$ 0
Porter [Member]
Enlightenment Capital Credit Agreement [Abstract]
Maturity date							Jul. 01, 2017	Jul. 25, 2022
Enlightenment Capital Solutions Fund II LP [Member]
Enlightenment Capital Credit Agreement [Abstract]
Senior term loan			$ 16,000,000
Maturity date			Jan. 15, 2021	Jan. 25, 2022
Credit agreement exit fee			$ 1,200,000	$ 825,000
Effective interest rate			17.30%
Additional borrowings			$ 5,000,000
Principal amount			$ 16,000,000
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			$ 110,000
Exit fee			$ 1,200,000	$ 825,000
Enlightenment Capital Solutions Fund II LP [Member] | Class A Common Stock [Member]
Enlightenment Capital Credit Agreement [Abstract]
Warrants issued to purchase shares of common stock (in shares) | shares						900,970
Common stock, par value (in dollars per share) | $ / shares						$ 0
Percentage of warrants issued of common equity interests						2.50%
Warrants exercise price (in dollars per share) | $ / shares						$ 1.665
Warrants expiration date								Jan. 25, 2027
Emmett J. Wood [Member]
Enlightenment Capital Credit Agreement [Abstract]
Number of shares held by related party (in shares) | shares								682,502	682,502
Emmett J. Wood [Member] | Class A Common Stock [Member]
Enlightenment Capital Credit Agreement [Abstract]
Number of shares held by related party (in shares) | shares					50,000
Term loan [Member] | Enlightenment Capital Solutions Fund II LP [Member]
Enlightenment Capital Credit Agreement [Abstract]
Senior term loan						$ 11,000,000
Maturity date								Jan. 25, 2022
Accrued interest rate						13.00%
Increase in interest rate						14.50%
Increase in interest rate in event of default						2.00%
Monthly accrued interest rate during continuance of an Alternate Interest Rate Event						11.50%
Number of days prior written notice								30 days
Principal amount						$ 11,000,000
Term loan [Member] | Enlightenment Capital Solutions Fund II LP [Member] | Minimum [Member]
Enlightenment Capital Credit Agreement [Abstract]
Monthly accrued interest rate								10.00%