Description of Operations and Summary of Significant Accounting Policies - Basic and Diluted Earnings Per Share (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Accounting Policies [Abstract]
Net income	$ 485,400	$ 205,400	$ 438,600	$ 176,100
Weighted average common shares outstanding	12,611,133	12,427,262	12,611,133	12,427,262
Basic net income per share	$ 0.04	$ 0.02	$ 0.03	$ 0.01
Interest expense on convertible notes	22,700	22,700	45,400	45,100
Income for computing diluted net income per share	$ 508,100	$ 228,100	$ 484,000	$ 221,200
Incremental shares from assumed exercise of dilutive securities	2,257,260	2,179,911	2,257,260	2,179,911
Dilutive potential common shares	14,868,393	14,607,173	14,868,393	14,607,173
Diluted net earnings per share	$ 0.03	$ 0.02	$ 0.03	$ 0.01