STATEMENTS OF SHAREHOLDERS' EQUITY (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Total
Balance at Dec. 31, 2010	$ 6,912	$ 33,272,237	$ 12,417,924	$ (981,226)	$ (45,404)	$ 44,670,443
Balance (in shares) at Dec. 31, 2010	6,911,570
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net Income	0	0	7,416,928	0	0	7,416,928
Change in unrealized loss from interest rate swap	0	0	0	0	23,632	23,632
Common stock issued upon exercise of options	165	614,282	0	0	0	614,447
Common stock issued upon exercise of options (in shares)	165,333					165,333
Common stock issued as employee compensation	3	36,154	0	0	0	36,157
Common stock issued as employee compensation (in shares)	2,735
Stock based compensation expense	0	985,600	0	0	0	985,600
Tax benefit from stock option plans	0	438,000	0	0	0	438,000
Treasury stock (acquired) retired	0	0	0	(159,000)	0	(159,000)
Treasury stock (acquired) retired (in shares)	0
Balance at Dec. 31, 2011	7,080	35,346,273	19,834,852	(1,140,226)	(21,772)	54,026,207
Balance (in shares) at Dec. 31, 2011	7,079,638
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net Income	0	0	11,011,130	0	0	11,011,130
Change in unrealized loss from interest rate swap	0	0	0	0	(19,055)	(19,055)
Common stock issued in share offering	1,195	13,322,499	0	0	0	13,323,694
Common stock issued in share offering (in shares)	1,195,750
Common stock issued upon exercise of options	210	1,290,305	0	0	0	1,290,515
Common stock issued upon exercise of options (in shares)	210,143					240,000
Common stock issued as employee compensation	19	266,032	0	0	0	266,051
Common stock issued as employee compensation (in shares)	19,165
Stock based compensation expense	0	382,657	0	0	0	382,657
Tax benefit from stock option plans	0	313,000	0	0	0	313,000
Treasury stock (acquired) retired	(133)	(1,140,093)	0	1,140,226	0	0
Treasury stock (acquired) retired (in shares)	(133,257)
Balance at Dec. 31, 2012	8,371	49,780,673	30,845,982	0	(40,827)	80,594,199
Balance (in shares) at Dec. 31, 2012	8,371,439
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net Income	0	0	7,736,894	0	0	7,736,894
Change in unrealized loss from interest rate swap	0	0	0	0	19,712	19,712
Common stock issued upon exercise of options	18	(18)	0	0	0	0
Common stock issued upon exercise of options (in shares)	18,399					45,000
Common stock issued as employee compensation	21	193,884	0	0	0	193,905
Common stock issued as employee compensation (in shares)	20,655
Stock based compensation expense	0	379,809	0	0	0	379,809
Tax benefit from stock option plans	0	27,000	0	0	0	27,000
Balance at Dec. 31, 2013	$ 8,410	$ 50,381,348	$ 38,582,876	$ 0	$ (21,115)	$ 88,951,519
Balance (in shares) at Dec. 31, 2013	8,410,493