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11. Stock-Based Compensation (Details 2) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Dividend-yield	0.00%
Risk-free interest rate	0.95%
Expected volatility	66.37%
Expected life (years)	1 year 7 months 17 days
Market value per share on grant date	$ 4.06	$ 8.78
Equity Option [Member]
Dividend-yield	0.00%	0.00%
Risk-free interest rate	1.61%	0.88%
Expected volatility	76.55%	77.86%
Expected life (years)	5 years 4 months 24 days	3 years
Market value per share on grant date	$ 3.69	$ 4.38
Weighted average fair value per share of common stock	$ 2.27	$ 2.22

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