9. Stock-Based Compensation - Ranges for options outstanding (Details 1)	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Outstanding at end of year, Shares | shares	2,555,263
Weighted Average Remaining Contractual Life	6 years 9 months 4 days
Wtd. Avg Exercise Price
Outstanding at end of year | $ / shares	$ 1.80
0.49-$1.00
Outstanding at end of year, Shares | shares	167,853
Weighted Average Remaining Contractual Life	1 year 11 months 12 days
Wtd. Avg Exercise Price
Outstanding at end of year | $ / shares	$ .92
1.01-$1.30
Outstanding at end of year, Shares | shares	670,651
Weighted Average Remaining Contractual Life	3 years 7 months 17 days
Wtd. Avg Exercise Price
Outstanding at end of year | $ / shares	$ 1.14
1.31-$2.00
Outstanding at end of year, Shares | shares	290,167
Weighted Average Remaining Contractual Life	4 years 6 months 25 days
Wtd. Avg Exercise Price
Outstanding at end of year | $ / shares	$ 1.43
2.01-$10.75
Outstanding at end of year, Shares | shares	1,426,592
Weighted Average Remaining Contractual Life	9 years 3 months
Wtd. Avg Exercise Price
Outstanding at end of year | $ / shares	$ 2.28