Shareholders' Equity Activity for stock options and warrants (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares $ / warrant shares	Dec. 31, 2014 USD ($) $ / shares $ / warrant shares	Dec. 31, 2013 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value | $	$ 100
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value | $	$ 0	$ 28,600
Common Stock Warrants, Shares		3,550,956
Weighted Average Exercise Price, Warrants Outstanding | $ / warrant	13.72	14.12
Weighted Average Remaining Contractual Term warrant outstanding	1 year 3 months 4 days
Weighted Average Remaining Contractual Term, Warrants Outstanding		2 years 1 month 13 days
Aggregate Intrinsic Value, Warrants Outstanding | $	$ 0	$ 1,000
Share-based Compensation Arrangement by Share-based Payment Award, Options and Non-Option Equity Instruments, Outstanding [Roll Forward]
Warrants Granted	0
Weighted Average Exercise Price, Warrants Granted | $ / shares	$ 0
Warrants Exercised	0
Weighted Average Exercise Price, Warrants Exercised | $ / shares	$ 0
Warrants Expired	0
Weighted Average Exercise Price, Warrants Expired | $ / shares	$ 0
Warrants Canceled	(336,923)
Weighted Average Exercise Price, Warrants Canceled | $ / shares	$ 17.91
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value | $	$ 100
shares, vested and expected to vest	3,214,033
Weighted Average Exercise Price, Warrants vested & expected to vest | $ / warrant	13.72
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	3,214,033
Weighted Average Exercise Price, Warrants Exercisable | $ / warrant	13.72
weighted Average Remaining Contractual Term, warrants vested	1 year 3 months 4 days
Aggregate Intrinsic Value, Warrants vested and expected to vest | $	$ 0
Aggregate Intrinsic Value, Warrants vested | $	$ 0
Warrant [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options and Non-Option Equity Instruments, Outstanding [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price | $ / shares	$ 0.00	$ 0.00	$ 3.71
US Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price | $ / shares	$ 6.46	$ 9.19
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	6 years 10 months 17 days	6 years 11 months 5 days
Common stock, shares, outstanding (shares)	3,214,033
Weighted Average Remaining Contractual Term, Warrants Vested and Expect to Vest	1 year 3 months 4 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	6,663,480
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price | $ / shares	$ 6.58
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	6 years 9 months 15 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	3,414,388
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares	$ 3.01
Share-based Compensation Arrangement by Share-based Payment Award, Options and Non-Option Equity Instruments, Outstanding [Roll Forward]
Stock Options, Outstanding at December 31, 2011	4,427,234
Stock Options Exercised	0
Stock Options Forfeited	(740,372)
Stock Options Expired	(437,770)
Stock Options, Outstanding at September 30, 2012	6,663,480	4,427,234
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price | $ / shares	$ 7.83
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price | $ / shares	4.92
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price | $ / shares	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number	4,837,711
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price | $ / shares	$ 7.46
Options, Vested, weighted Average Remaining Contractual Term	6 years 1 month 13 days