8. COMMON STOCK - Dutch auction (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Aug. 06, 2014	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Repurchase of common stock, amount		$ 7,112	$ 7,026	$ 30,026
Modified Dutch Auction
Repurchase of common stock, shares	3,846,153
Treasury stock acquired cost per share	$ 6.50
Repurchase of common stock, amount	$ 25,000