Note 10 - Per Share Data (Detail) - Unissued shares of common stock were reserved for the following purposes	Jun. 30, 2012	Dec. 31, 2011
Exercise of options outstanding	848,844	916,594
Future grants of options or shares	417,600	437,600
Shares reserved for employee stock purchase plan	263,056	276,957
Total	1,529,500	1,631,151