Note 3 - Fair Value Measurements (Tables)

3 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

June 30, 2013	Level 1		Level 2		Level 3		Carrying Value
Marketable securities	$	-	$	11,399	$	-	$	11,399
Total assets at fair value	$	-	$	11,399	$	-	$	11,399

March 31, 2013	Level 1		Level 2		Level 3		Carrying Value
Marketable securities	$	-	$	12,307	$	-	$	12,307
Total assets at fair value	$	-	$	12,307	$	-	$	12,307