Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Paid-In Capital [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2012	$ 16	$ 207,339	$ (171,176)	$ (9)	$ 36,170
Balance shares at Dec. 31, 2012	16,150,163
Net loss			(20,294)		(20,294)
Common stock issuance for loan principal and interest	2	5,094			5,096
Common stock issuance for loan principal and interest, shares	1,992,127
Restricted common stock issued for services	0				0
Restricted common stock issued for services, shares	46,925
Stock compensation expense		381			381
Common stock issuance	2	3,598			3,600
Common stock issuance, shares	1,547,843
Common stock issued for services	0	291			291
Common stock issued for services, shares	83,200
Common stock issued for loan interest and fees
Common stock issued for land obligations
Common stock issued for settlement of litigation
Balance at Dec. 31, 2013	20	216,703	(191,470)	(9)	25,244
Balance shares at Dec. 31, 2013	19,820,258
Net loss			(10,684)		(10,684)
Common stock issuance					1,038
Common stock issuance, shares					428,765
Common stock issued, net of issuance costs	5	11,887			11,892
Common stock issued, net of issuance costs, shares	4,729,458
Common stock issued for loan interest and fees	0	840			840
Common stock issued for loan interest and fees, shares	325,853
Common stock issued for land obligations	0	342			342
Common stock issued for land obligations, shares	127,359
Common stock issued for settlement of litigation	0	334			334
Common stock issued for settlement of litigation, shares	119,231
Stock compensation expense and related share issuances, net of shares withheld for the payment of taxes	0	1,031			1,031
Stock compensation expense and related share issuances, net of shares withheld for the payment of taxes, shares	162,141
Conversion feature		2,497			2,497
Minimum withholding taxes on net share settlements of equity awards		(110)			(110)
Purchase of treasury stock				(249)	(249)
Purchase of treasury stock, shares	(91,631)
Balance at Dec. 31, 2014	$ 25	$ 233,524	$ (202,154)	$ (258)	$ 31,137
Balance shares at Dec. 31, 2014	25,192,669