Consolidated Statements of Stockholders' Deficit - USD ($) $ in Thousands	Shares Issued Pursuant to Shelf Takedown [Member] Common Stock [Member]	Shares Issued Pursuant to Shelf Takedown [Member] Additional Paid-in Capital [Member]	Shares Issued Pursuant to Shelf Takedown [Member] Retained Earnings [Member]	Shares Issued Pursuant to Shelf Takedown [Member]	Shares Issued to Lenders [Member] Common Stock [Member]	Shares Issued to Lenders [Member] Additional Paid-in Capital [Member]	Shares Issued to Lenders [Member] Retained Earnings [Member]	Shares Issued to Lenders [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2013									16,152,756
Balance at Dec. 31, 2013									$ 161	$ 303,979	$ (340,638)	$ (36,498)
Issuance of shares pursuant to stock awards (in shares)									29,327
Stock Issued During Period, Shares, New Issues	1,435,713
Stock Issued During Period, Value, New Issues	$ 14	$ 14,443		$ 14,457
Issuance of shares pursuant to warrant exercise (in shares)									24,441
Stock Issued During Period, Shares, Conversion of Convertible Securities									39,037
Issuance of stock pursuant to bond conversion									$ 1	310		311
Stock compensation expense									1	872		873
Net Income (Loss) Attributable to Parent											(18,881)	(18,881)
Balance (in shares) at Dec. 31, 2014									17,681,274
Balance at Dec. 31, 2014									$ 177	319,604	(359,519)	(39,738)
Issuance of stock pursuant to bond conversion (in shares)									39,037
Stock Issued During Period, Value, Conversion of Convertible Securities									$ 1	310		311
Issuance of shares pursuant to stock awards (in shares)									68,109
Stock Issued During Period, Shares, Conversion of Convertible Securities									126,633
Issuance of stock pursuant to bond conversion									$ 1	1,005		1,006
Stock compensation expense									1	1,107		1,108
Net Income (Loss) Attributable to Parent											(24,013)	(24,013)
Balance (in shares) at Dec. 31, 2015									17,876,016
Balance at Dec. 31, 2015									$ 179	326,855	(383,532)	(56,498)
Conversion Features										5,139		5,139
Issuance of stock pursuant to bond conversion (in shares)									126,633
Stock Issued During Period, Value, Conversion of Convertible Securities									$ 1	1,005		$ 1,006
Issuance of shares pursuant to stock awards (in shares)									207,868
Stock Issued During Period, Shares, New Issues	1,150,000				1,128,257			46,236
Stock Issued During Period, Value, New Issues	$ 12	$ 10,498		$ 10,510	$ 11	$ 6,075		$ 6,086
Stock Issued During Period, Shares, Conversion of Convertible Securities									1,406,723			1,406,723
Issuance of stock pursuant to bond conversion									$ 14	9,566		$ 9,580
Stock compensation expense									2	860		862
Net Income (Loss) Attributable to Parent											(26,339)	(26,339)
Balance (in shares) at Dec. 31, 2016									21,768,864
Balance at Dec. 31, 2016									$ 218	355,336	(409,871)	(54,317)
Conversion Features										1,482		$ 1,482
Issuance of stock pursuant to bond conversion (in shares)									1,406,723			1,406,723
Stock Issued During Period, Value, Conversion of Convertible Securities									$ 14	$ 9,566		$ 9,580