Consolidated Statements of Stockholders' Deficit - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2012	15,438,961
Balance at Dec. 31, 2012	$ 154	$ 301,039	$ (317,961)	$ (16,768)
Issuance of shares pursuant to stock awards (in shares)	13,795
Issuance of stock to lenders (in shares)	700,000
Issuance of stock to lenders	$ 7	2,428		2,435
Stock compensation expense		$ 512		512
Net loss			$ (22,677)	(22,677)
Balance (in shares) at Dec. 31, 2013	16,152,756
Balance as of December 31, 2013 at Dec. 31, 2013	$ 161	$ 303,979	$ (340,638)	(36,498)
Issuance of shares pursuant to stock awards (in shares)	29,327
Issuance of stock to lenders (in shares)	1,435,713
Issuance of stock to lenders	$ 14	14,443		14,457
Stock compensation expense	$ 1	$ 872		873
Net loss			$ (18,881)	(18,881)
Balance (in shares) at Dec. 31, 2014	17,681,274
Balance as of December 31, 2013 at Dec. 31, 2014	$ 177	$ 319,604	$ (359,519)	(39,738)
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
Issuance of shares pursuant to stock awards (in shares)	68,109
Stock compensation expense	$ 1	$ 1,107		1,108
Net loss			$ (24,013)	(24,013)
Balance (in shares) at Dec. 31, 2015	17,876,016
Balance as of December 31, 2013 at Dec. 31, 2015	$ 179	$ 326,855	$ (383,532)	$ (56,498)
Stock Issued During Period, Shares, Conversion of Convertible Securities	126,633			126,633
Issuance of stock pursuant to bond conversion	$ 1	1,005		$ 1,006
Convertible term loan conversion option		$ 5,139		$ 5,139