Shareholders' Equity Activity for stock options and warrants (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares $ / warrant shares	Dec. 31, 2015 USD ($) $ / shares $ / warrant shares	Mar. 10, 2016 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 | $	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value | $	$ 0	$ 100
Common Stock Warrants, Shares		321,404	141,844
Weighted Average Exercise Price, Warrants Outstanding | $ / warrant	76.5	137.2
Weighted Average Remaining Contractual Term warrant outstanding	1 year 2 months 27 days
Weighted Average Remaining Contractual Term, Warrants Outstanding		1 year 3 months 4 days
Aggregate Intrinsic Value, Warrants Outstanding | $	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options and Non-Option Equity Instruments, Outstanding [Roll Forward]
Warrants Granted	171,845
Weighted Average Exercise Price, Warrants Granted | $ / shares	$ 9.3
Warrants Exercised	0
Weighted Average Exercise Price, Warrants Exercised | $ / shares	$ 0
Warrants Expired	251
Weighted Average Exercise Price, Warrants Expired | $ / shares	$ 700.0
Warrants Canceled	(105,438)
Weighted Average Exercise Price, Warrants Canceled | $ / shares	$ 152.7
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value | $	$ 0
shares, vested and expected to vest	388,062
Weighted Average Exercise Price, Warrants vested & expected to vest | $ / warrant	76.50
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	388,062
Weighted Average Exercise Price, Warrants Exercisable | $ / warrant	76.50
weighted Average Remaining Contractual Term, warrants vested	1 year 2 months 27 days
Aggregate Intrinsic Value, Warrants vested and expected to vest | $	$ 0
Aggregate Intrinsic Value, Warrants vested | $	$ 0
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	$ 39.9	$ 64.6
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	7 years 7 months 6 days	6 years 10 months 17 days
Common stock, shares, outstanding (shares)	388,062
Weighted Average Remaining Contractual Term, Warrants Vested and Expect to Vest	1 year 2 months 27 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	938,889
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price | $ / shares	$ 40.3
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	7 years 6 months 29 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	464,815
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares	$ 5.3
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	666,348
Stock Options Exercised	0	0
Stock Options Forfeited	(107,860)
Stock Options Expired	(70,513)
Stock Options, Outstanding at September 30, 2012	952,790	666,348
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price | $ / shares	$ 48.3
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price | $ / shares	32.7
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	769,224
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price | $ / shares	$ 46.2
Options, Vested, weighted Average Remaining Contractual Term	7 years 3 months 7 days