CONDENSED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) (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, 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	1,919,320	0	0	1,919,320
Change in unrealized loss from interest rate swap	0	0	0	0	(25,278)	(25,278)
Common stock issued upon exercise of options	46	240,969	0	0	0	241,015
Common stock issued upon exercise of options (in shares)	46,078
Tax benefit of stock option exercise						0
Common stock issued as bonus	15	228,275	0	0	0	228,290
Common stock issued as bonus (in shares)	15,260
Stock compensation expense	0	382,657	0	0	0	382,657
Treasury stock retired	(133)	(1,140,093)	0	1,140,226	0	0
Treasury stock retired (in shares)	(133,257)
Balance at Mar. 31, 2012	7,008	35,058,081	21,754,172	0	(47,050)	56,772,211
Balance (in shares) at Mar. 31, 2012	7,007,719
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	1,671,276	0	0	1,671,276
Change in unrealized loss from interest rate swap	0	0	0	0	3,711	3,711
Common stock issued upon exercise of options	3	(3)	0	0	0	0
Common stock issued upon exercise of options (in shares)	2,645					20,000
Tax benefit of stock option exercise	0	(26,000)	0	0	0	(26,000)
Common stock issued as bonus	18	152,056	0	0	0	152,074
Common stock issued as bonus (in shares)	17,870
Stock compensation expense	0	360,964	0	0	0	360,964
Balance at Mar. 31, 2013	$ 8,392	$ 50,267,690	$ 32,517,258	$ 0	$ (37,116)	$ 82,756,224
Balance (in shares) at Mar. 31, 2013	8,391,954