Consolidated Balance Sheets (Parentheticals) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Assets
Allowance for doubtful accounts	$ 108,000	$ 91,000
Accumulated depreciation and amortization	$ 6,214,000	$ 6,570,000
Shareholders' equity:
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	10,331,519	9,712,948
Common stock, shares outstanding	10,331,519	9,712,948