Income Taxes - Additional Information (Detail) (USD $)	6 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009
Income Taxes [Line Items]
Net operating losses, Federal	$ 30,000,000
Tax credit carryforwards	1,357,000		2,342,000
Net operating losses, State	42,000,000
Deferred tax assets, gross	18,360,000		19,032,000
Valuation allowance comparison	0	(2,200,000)	(600,000)	(4,500,000)	11,200,000
Undistributed earnings of foreign corporations not included in consolidated federal income tax returns	800,000		300,000
Total unrecognized tax benefit	710,000	447,000	1,725,000	519,000	374,000	185,000
Unrecognized tax benefits that would impact effective tax rate			900,000
Unrecognized tax benefits, income tax penalties accrued	300,000		400,000
Federal [Member]
Income Taxes [Line Items]
Tax credit carryforwards	900,000
Net operating losses, Expiration	2024
Net operating losses related to stock based compensation	27,900,000
State [Member]
Income Taxes [Line Items]
Tax credit carryforwards	1,000,000
Net operating losses, Expiration	2018
Net operating losses related to stock based compensation	8,600,000
Foreign Tax Authority [Member]
Income Taxes [Line Items]
Deferred tax assets, gross			$ 700,000