Revolving Credit Facility and Bank Borrowings (Revolving Credit Facilities and Notes Payable) (Details)	Jun. 30, 2017 USD ($)	Jun. 30, 2017 CNY (¥)
Line of Credit Facility [Line Items]
Amount allowed for repurchase under Amendment	$ 108,700,000
Senior Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Outstanding letters of credit	$ 1,300,000
Enterprise Software System Financing [Member] | Minimum [Member] | Notes Payable [Member]
Line of Credit Facility [Line Items]
Notes payable stated interest rate (percent)	1.95%	1.95%
Enterprise Software System Financing [Member] | Maximum [Member] | Notes Payable [Member]
Line of Credit Facility [Line Items]
Notes payable stated interest rate (percent)	2.826%	2.826%
Revolving Credit Facility [Member] | Senior Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Current borrowing capacity	$ 80,000,000
Amount allowed for repurchase under Amendment	50,000,000
Maximum capital expenditures and commitments	50,000,000
Outstanding borrowing threshold for covenant restrictions	$ 20,000,000
Minimum fixed charge coverage ratio	110.00%	110.00%
Leverage ratio	200.00%	200.00%
Weighted average Interest rate (percent)	2.49%	2.49%
Available borrowing capacity	$ 78,700,000
Revolving Credit Facility [Member] | Asia Pacific Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Current borrowing capacity	8,800,000	¥ 60,000,000
Revolving Loan Facility [Member] | Asia Pacific Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Current borrowing capacity	$ 5,900,000	¥ 40,000,000