Current Liabilities and Debt Obligations, Enlightenment Capital Credit Agreement (Details) - USD ($)					3 Months Ended		9 Months Ended
	Jul. 19, 2019	Jul. 18, 2019	Jan. 25, 2017	Mar. 31, 2015	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Apr. 18, 2017
Accounts Payable and Other Accrued Payables [Abstract]
Trade account payables					$ 20,800,000		$ 20,800,000		$ 18,500,000
Accrued trade payables					2,400,000		2,400,000		3,300,000
Enlightenment Capital Credit Agreement [Abstract]
Senior term loan, net					$ 16,149,000		16,149,000		10,984,000
Credit Agreement [Member]
Enlightenment Capital Credit Agreement [Abstract]
Increase in interest rate					1.00%
Credit agreement exit fee					$ 825,000		$ 825,000
Effective interest rate					15.00%		15.00%
Credit agreement transaction costs							$ 374,000
Senior term loan principal, including exit fee					$ 17,200,000		17,200,000		11,825,000
Less: Unamortized discount, debt issuance costs, and lender fees					(1,051,000)		(1,051,000)		(841,000)
Senior term loan, net					16,149,000		16,149,000		$ 10,984,000
Interest expense					700,000	$ 400,000	1,500,000	$ 1,300,000
Exit fee					$ 825,000		$ 825,000
Class A Common Stock [Member] | Credit Agreement [Member] | Mr. John B. Wood [Member]
Enlightenment Capital Credit Agreement [Abstract]
Number of shares held by chief executive officer (in shares)					50,000		50,000
Porter [Member]
Enlightenment Capital Credit Agreement [Abstract]
Maturity date				Jul. 01, 2017			Jul. 25, 2022
Aggregate redemption price										$ 2,100,000
Enlightenment Capital Solutions Fund, II L.P. [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 L.P. [Member] | Class A Common Stock [Member]
Enlightenment Capital Credit Agreement [Abstract]
Warrants issued to purchase shares of common stock (in shares)			1,135,284.333
Common stock par value (in dollars per share)			$ 0
Percentage of warrants issued of common equity interests			2.50%
Warrants exercise price (in dollars per share)			$ 1.321
Warrants expiration date					Jan. 25, 2027		Jan. 25, 2027
Term Loan [Member] | Enlightenment Capital Solutions Fund, II L.P. [Member]
Enlightenment Capital Credit Agreement [Abstract]
Senior term loan			$ 11,000,000
Maturity date							Jan. 25, 2022
Accrual rate			13.00%
Increase in interest rate			14.50%
Increase in interest rate in event of default			2.00%
Monthly accrued interest rate			10.00%
Monthly accrued interest rate during continuance of an Alternate Interest Rate Event			11.50%
Number of days prior written notice							30 days
Proceeds from loan prepayment			$ 1,100,000
Principal amount			$ 11,000,000