Note 5 - Stockholders' Equity (Detail) - Stock Option Transactions (USD $)	3 Months Ended
Mar. 31, 2013
Outstanding at December 31, 2012	1,069,141
Outstanding at December 31, 2012 (in Dollars per share)	$ 4.50
Granted	0
Granted (in Dollars per share)	$ 0
Exercised	0
Exercised (in Dollars per share)	$ 0
Forfeited or expired	(14,999)
Forfeited or expired (in Dollars per share)	$ 15.28
Outstanding at March 31, 2013	1,054,142
Outstanding at March 31, 2013 (in Dollars per share)	$ 4.35
Exercisable at March 31, 2013	695,796
Exercisable at March 31, 2013 (in Dollars per share)	$ 6.15

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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