7. Stock Option Activity (Details)	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares
Number of Shares
Number of Shares, Outstanding at beginning of period	302,834
Number of Shares, Granted	135,430
Number of Shares, Exercised	0
Number of Shares, Forfeited and canceled	(20,016)
Number of Shares, Outstanding at end of period	418,248
Number of Shares, Exercisable at end of period	199,524
Weighted average exercise price
Weighted average exercise price, Outstanding at beginning of period | $ / shares	$ 23.34
Weighted average exercise price, Granted | $ / shares	5.22
Weighted average exercise price, Exercised | $ / shares	0
Weighted average exercise price, Forfeited and canceled | $ / shares	10.03
Weighted average exercise price, Outstanding at end of period | $ / shares	18.11
Weighted average exercise price, Exercisable at end of period | $ / shares	$ 26.37
Weighted average remaining contract term
Weighted average remaining contract term, Outstanding at end of period	7 years 10 months 24 days
Weighted average remaining contract term, Exercisable at end of period	6 years 10 months 24 days
Intrinsic Value, Outstanding at end of period | $	$ 802
Intrinsic Value, Exercisable at end of period | $	$ 0