Current Liabilities and Debt Obligations, Senior Revolving Credit Facility (Details) - USD ($)		12 Months Ended
	Mar. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Mar. 26, 2015
Senior Revolving Credit Facility [Abstract]
Interest rate on credit facility			5.75%
Weighted average interest rates on outstanding borrowings				6.70%
Revolving credit [Member]
Senior Revolving Credit Facility [Abstract]
Interest expense			$ 200,000	$ 600,000
Maximum revolving credit facility	$ 10,000,000				$ 20,000,000
Current line of credit borrowing capacity	2,000,000				$ 1,250,000
Current line of credit borrowing capacity, condition one	2,500,000
Current line of credit borrowing capacity, condition two	3,000,000
Equity or subordinated debt	5,000,000
Amount of fee expected to be paid if capital investment is not received by specified date	100,000
Fees paid in connection with amendment	$ 100,000
Revolving credit [Member] | Prime Rate [Member]
Senior Revolving Credit Facility [Abstract]
Percentage added to reference rate to compute the variable rate	2.25%
Revolving credit [Member] | Federal Funds Rate [Member]
Senior Revolving Credit Facility [Abstract]
Percentage added to reference rate to compute the variable rate	2.75%
Revolving credit [Member] | 3-Month LIBOR [Member]
Senior Revolving Credit Facility [Abstract]
Percentage added to reference rate to compute the variable rate	3.25%
Term of variable rate		3 months