Stock Options and Warrants - Stock Option Plan Activity Rollforward (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Number of Options
Balance at the beginning of the period (in shares)	595,125	598,475
Granted (in shares)	60,000	200,000
Exercised (in shares)		(300)
Expired (in shares)	(20,125)	(203,050)
Balance at the end of the period (in shares)	635,000	595,125
Exercisable at the end of the period (in shares)	497,500
Weighted Average Exercise Price
Balance at the beginning of the period (in dollars per share)	$ 3.41	$ 3.85
Granted (in dollars per share)	2.75	3.20
Exercised (in dollars per share)		3.00
Expired (in dollars per share)	3.42	2.63
Balance at the end of the period (in dollars per share)	3.39	3.41
Exercisable at the end of the period (in dollars per share)	3.45
Minimum
Weighted Average Exercise Price
Balance at the beginning of the period (in dollars per share)	2.00	2.00
Expired (in dollars per share)	2.00	2.00
Balance at the end of the period (in dollars per share)	2.75	2.00
Exercisable at the end of the period (in dollars per share)	2.75
Maximum
Weighted Average Exercise Price
Balance at the beginning of the period (in dollars per share)	4.10	5.05
Expired (in dollars per share)	4.10	5.05
Balance at the end of the period (in dollars per share)	3.50	$ 4.10
Exercisable at the end of the period (in dollars per share)	$ 3.50