Note 6 - Summary of Options Outstanding (Details)	12 Months Ended
	Mar. 31, 2016 $ / shares shares
Range One [Member]
Ranges of Exercise Prices, Lower Limit (in dollars per share)	$ 31.27
Ranges of Exercise Prices, Upper Limit (in dollars per share)	$ 5,000
Number Outstanding (in shares) | shares	37.12
Weighted Average Exercise Price (in dollars per share)	$ 2.80
Range Two [Member]
Ranges of Exercise Prices, Lower Limit (in dollars per share)	51.04
Ranges of Exercise Prices, Upper Limit (in dollars per share)	$ 16,000
Number Outstanding (in shares) | shares	57.77
Weighted Average Exercise Price (in dollars per share)	$ 7.20
Number Outstanding (in shares) | shares	52.85
Weighted Average Exercise Price (in dollars per share)	$ 6.20