CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Accounts receivable, allowances for doubtful accounts	$ 854	$ 306
Common Stock, par value per share	$ 0.0001
Common Stock, shares authorized	180,000
Class A [Member]
Common Stock, par value per share	$ 0.0001	$ 0.0001
Common Stock, shares authorized	139,500	139,500
Common Stock, shares outstanding	66,084	65,229
Class B [Member]
Common Stock, par value per share	$ 0.0001	$ 0.0001
Common Stock, shares authorized	40,500	40,500
Common Stock, shares outstanding	4,394	4,396