Stock-Based Compensation (Details) - Common stock options - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Options
Outstanding at beginning of year	2,555,263	1,390,770
Granted	739,000	1,300,881
Exercised	(103,308)	(131,388)
Forfeited	(469,856)	(3,438)
Expired	(207,238)	(1,562)
Outstanding at end of year	2,513,861	2,555,263
Stock options exercisable at year end	1,329,392	1,185,582
Wtd. Avg. Exercise Price
Outstanding at beginning of year	$ 1.80	$ 1.50
Granted	1.80	2.06
Exercised	1.22	1.23
Forfeited	2.15	3.77
Expired - vested	1.50	3.77
Outstanding at end of year	1.78	1.80
Stock options exercisable at year end	$ 1.66	$ 1.42