Note 7 - Commitments and Contingencies (Detail) - Minimum Rental Commitment for Long-term Non-cancelable Leases (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
2013, remaining	$ 155
2014	591
2015	585
2016	586
2017	577
2018	571
Thereafter	4,060
Total	7,125
Operating Lease Expense, Other Expense [Member]
2013, remaining	14
2014	28
2015	22
2016	23
2017	14
2018	8
Total	109
Principal Owner [Member]
2013, remaining	141
2014	563
2015	563
2016	563
2017	563
2018	563
Thereafter	4,060
Total	$ 7,016