Condensed Balance Sheets (USD $)	Mar. 31, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 19,461,000	$ 20,271,000
Accounts receivable, net	6,122,000	3,784,000
Inventories	325,000	310,000
Deferred tax assets	478,000	478,000
Income tax receivable	828,000	800,000
Prepaid expenses and other	443,000	516,000
Total Current Assets	27,657,000	26,159,000
Other Assets:
Property and equipment, net	1,990,000	2,149,000
Other, net	3,279,000	3,398,000
Total Assets	32,926,000	31,706,000
Current Liabilities:
Accounts payable	2,618,000	2,122,000
Accrued liabilities	1,074,000	1,844,000
Income tax payable	563,000
Deferred revenue	749,000	402,000
Total Current Liabilities	5,004,000	4,368,000
Long-Term Liabilities:
Deferred tax liabilities	413,000	413,000
Accrued income taxes	430,000	430,000
Total Long-Term Liabilities	843,000	843,000
Commitments and Contingencies
Shareholders' Equity:
Common stock, par value $0.01: Authorized shares - 40,000,000 Issued and outstanding shares - 13,660,000 at March 31, 2013 and 13,602,000 at December 31, 2012	137,000	136,000
Additional paid-in capital	22,841,000	22,678,000
Retained earnings	4,101,000	3,681,000
Total Shareholders' Equity	27,079,000	26,495,000
Total Liabilities and Shareholders' Equity	$ 32,926,000	$ 31,706,000