Consolidated Statement of Changes in Stockholders' Equity - USD ($)	Plans Other than Equity Incentive Plan [Member] Common Stock [Member]	Plans Other than Equity Incentive Plan [Member] Additional Paid-in Capital [Member]	Plans Other than Equity Incentive Plan [Member] Treasury Stock [Member]	Plans Other than Equity Incentive Plan [Member] Deferred Compensation, Share-based Payments [Member]	Plans Other than Equity Incentive Plan [Member] Retained Earnings [Member]	Plans Other than Equity Incentive Plan [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Deferred Compensation, Share-based Payments [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2014							12,278,440
Balance at Dec. 31, 2014							$ 184,177	$ 62,989,131	$ (238,157)	$ (5,839,992)	$ (50,071,087)	$ 7,024,072
Issuance of common stock, restricted (in shares)							5,000
Issuance of common stock, restricted							$ 5	11,945				11,950
Issuance of common stock, restricted, as deferred compensation (in shares)							290,547
Issuance of common stock, restricted, as deferred compensation							$ 4,358	1,235,642		(1,240,000)
Deferred compensation				$ 984,763		$ 984,763
Issuance of common stock under equity incentive plan (in shares)							26,946
Issuance of common stock under equity incentive plan							$ 370	138,449				138,819
Stock-based compensation related to stock grant, restricted shares and equity incentive plan								151,551				151,551
Purchase of treasury stock									(48,237)			(48,237)
Round-up of fractional shares from reverse split (in shares)							1,117
Round-up of fractional shares from reverse split
Stock option exercise (in shares)							167
Stock option exercise							$ 3	203				206
Reversal of deferred compensation that did not vest (in shares)	(222,680)
Reversal of deferred compensation amortization that did not vest	$ (3,380)	$ (224,423)		$ 63,867		$ (163,936)
Net income (loss)											1,016,088	1,016,088
Balance (in shares) at Dec. 31, 2015							12,379,537
Balance at Dec. 31, 2015							$ 185,533	64,302,498	(286,394)	(6,031,362)	(49,054,999)	9,115,276
Issuance of common stock, restricted (in shares)							30,000
Issuance of common stock, restricted							$ 30	51,670				51,700
Issuance of common stock, restricted, as deferred compensation (in shares)							167,153
Issuance of common stock, restricted, as deferred compensation							$ 168	419,053				419,221
Deferred compensation										914,902		914,902
Issuance of common stock under equity incentive plan (in shares)							82,265
Issuance of common stock under equity incentive plan							$ 87	329,019		70,768		399,874
Purchase of treasury stock									(431,755)			(431,705)
Reversal of deferred compensation that did not vest (in shares)							(266,667)
Reversal of deferred compensation amortization that did not vest							$ (4,000)	(1,220,875)		963,667		(261,208)
Net income (loss)											(1,196,642)	(1,196,642)
Balance (in shares) at Dec. 31, 2016							12,392,288
Balance at Dec. 31, 2016							$ 181,818	$ 63,881,365	$ (718,149)	$ (4,082,025)	$ (50,251,641)	$ 9,011,368