Note 5 - Capital Lease Obligations (Detail) - Capital lease assets balances (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Original Cost	$ 656
Accumulated Amortization	417
Net Book Value	239
July 2010 [Member]
Original Cost	215
Accumulated Amortization	191
Net Book Value	24
November 2010 [Member]
Original Cost	48
Accumulated Amortization	39
Net Book Value	9
June 2011 [Member]
Original Cost	140
Accumulated Amortization	82
Net Book Value	58
January 2012 Lease 1 [Member]
Original Cost	224
Accumulated Amortization	93
Net Book Value	131
January 2012 Lease 2 [Member]
Original Cost	29
Accumulated Amortization	12
Net Book Value	$ 17