5. Stock-Based Compensation (Details 1) - Warrants	3 Months Ended
	Mar. 31, 2016 USD ($) $ / shares shares
Class of Warrant or Right [Line Items]
Number of Shares, Outstanding at beginning of period | shares	3,662,954
Warrants, Granted | shares	0
Warrants, Exercised | shares	0
Warrants, Forfeited and canceled | shares	(51,823)
Number of Shares, Outstanding at end of period | shares	3,611,131
Number of Shares, Exercisable at end of period | shares	3,611,131
Weighted Average Exercise Price, Warrants
Weighted average exercise price, Outstanding at beginning of period | $ / shares	$ 6.30
Weighted average exercise price warrants, Granted | $ / shares	0.00
Weighted average exercise price warrants, Exercised | $ / shares	0.00
Weighted average exercise price warrants, Forfeited and canceled | $ / shares	83.52
Weighted average exercise price, Outstanding at end of period | $ / shares	5.19
Weighted average exercise price, Exercisable at end of period | $ / shares	$ 5.19
Weighted Average Remaining Contract Term, Warrants
Weighted Average Remaining Contract Term, Outstanding at end of period	1 year 11 months 16 days
Weighted Average Remaining Contract Term, Exercisable	1 year 11 months 16 days
Intrinsic Value, Warrants
Outstanding Aggregate Intrinsic Value, End of period | $	$ 0
Exercisable Aggregate Intrinsic Value | $	$ 0