Marketable Securities (Summary of available-for-sale securities ) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Marketable Securities, Realized Gain (Loss)	$ 93,000	$ 6,000
Aggregate Fair Value, Securities in a continuous loss position for less than 12 months	1,049,000
Aggregate Fair Value, Securities in a continuous loss position for more than 12 months	2,280,000
Aggregate Fair Value	3,329,000
Unrealized Losses, Securities in a continuous loss position for less than 12 months	65,000
Unrealized Losses, Securities in a continuous loss position for more than 12 months	26,000
Unrealized Losses	91,000
Foreign exchange contracts
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,506,000		$ 18,080,000
Gross Unrealized Gains	291,000		253,000
Gross Unrealized Losses	91,000		147,000
Estimated Fair Value	$ 10,706,000		$ 18,186,000