Share-based Compensation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Summary of share-based compensation expense for options
Total share-based compensation expense	$ 353	$ 1,481
Product development [Member]
Summary of share-based compensation expense for options
Total share-based compensation expense	68	113
Selling and marketing [Member]
Summary of share-based compensation expense for options
Total share-based compensation expense	15	114
General and administrative [Member]
Summary of share-based compensation expense for options
Total share-based compensation expense	$ 270	$ 1,254