Note 5 - Income (Loss) Per Share (Detail) - Schedule of earnings per share reconciliation (USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Basic net income (loss) per share computation:
Net income (loss) attributable to common stockholders (in Dollars)	$ (429,705)	$ 103,316	$ (1,098,505)	$ 22,521
Weighted-average common shares outstanding	2,717,585	2,650,063	2,708,335	2,648,608
Incremental shares attributable to the assumed exercise of outstanding stock options	0	86,930	0	85,242
Total adjusted weighted-average shares	2,717,585	2,736,993	2,708,335	2,733,850
Diluted net income (loss) per share attributable to common stockholders (in Dollars per share)	$ (0.16)	$ 0.04	$ (0.41)	$ 0.01
Basic net income (loss) per share attributable to common stockholders (in Dollars per share)	$ (0.16)	$ 0.04	$ (0.41)	$ 0.01