Note 3 - Stock-Based Compensation (Details) - Unrecognized Compensation Expense of Stock Options and Restricted Stock (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2013
Employee Stock Option [Member]
Note 3 - Stock-Based Compensation (Details) - Unrecognized Compensation Expense of Stock Options and Restricted Stock [Line Items]
Unrecognized compensation expense (in Dollars)	$ 89
Weighted average period over which unrecognized compensation expense is to be recognized (in years)	1 year 328 days
Restricted Stock [Member]
Note 3 - Stock-Based Compensation (Details) - Unrecognized Compensation Expense of Stock Options and Restricted Stock [Line Items]
Unrecognized compensation expense (in Dollars)	$ 335
Weighted average period over which unrecognized compensation expense is to be recognized (in years)	5 years 219 days