Revolving Credit Facility	12 Months Ended
Dec. 31, 2018
Debt Disclosure [Abstract]
Revolving Credit Facility	Revolving Credit Facility and Going Concern The Company entered into a Credit Agreement, dated as of August 2, 2010, subsequently amended most recently as of March 15, 2019, among the Company, the lenders party thereto and Bank of America, N.A., as Administrative Agent (the “Credit Agreement”). The Credit Agreement includes a revolving commitment amount of $175 million and $160 million in the aggregate through September 25, 2019 and September 25, 2020, respectively. The Credit Agreement also provides the Company the right to increase the aggregate commitment amount by an additional $50 million. Outstanding borrowings under the revolving credit facility are guaranteed by the Company’s material domestic subsidiaries, as defined in the Credit Agreement. The Company’s obligations under the Credit Agreement and such domestic subsidiaries’ guaranty obligations are secured by substantially all of their respective assets. The ranges of applicable rates charged for interest on outstanding loans and letters of credit are 50-225 basis point spread for loans based on the base rate and 150-325 basis point spread for letter of credit fees and loans based on the Eurodollar rate. The most recent amendment (i) modifies the definition of the term "Consolidated EBITDA" as used in the covenant calculations, (ii) increases the maximum leverage ratio to which the Company is subject for the trailing twelve month periods ended December 31, 2018 and ending March 31, 2019, respectively, and (iii) decreases the minimum interest coverage ratio to which the Company is subject for the trailing twelve month periods ended December 31, 2018 and ending March 31, 2019, respectively. The Company is also currently in the process of refinancing its debt. Please see Note 20 for further on events and circumstances occurring subsequent the balance sheet date. The previous amendment to the Credit Agreement, dated as of September 28, 2018, extended the maturity date from September 25, 2019 to September 25, 2020 and adjusted the applicable rate spreads charged for interest on outstanding loans and letters of credit. Additional modifications were subsequently superseded by the most recent amendment, dated as of March 15, 2019. The terms of the Credit Agreement include various covenants, including covenants that require the Company to maintain a maximum leverage ratio and a minimum interest coverage ratio. The most recent amendment to the Credit Agreement modified the maximum leverage ratio from 3.50 to 1.00 to 4.50 to 1.00 for the trailing twelve months ended December 31, 2018, and from 3.00 to 1.00 to 4.75 to 1.00 for the trailing twelve months ended March 31, 2019. The maximum leverage ratio is 3.00 to 1.00 for the trailing twelve months ending June 30, 2019 and each period thereafter. The most recent amendment to the Credit Agreement also modified the minimum interest coverage ratio from 5.00 to 1.00 to 4.00 to 1.00 for the trailing twelve months ended December 31, 2018, and from 5.00 to 1.00 to 3.50 to 1.00 for the trailing twelve months ending March 31, 2019. The minimum interest coverage ratio is 5.00 to 1.00 for the trailing twelve months ending June 30, 2019 and each period thereafter. At December 31, 2018, the Company's leverage ratio exceeded its 3.50 to 1.00 ratio and the Company's interest coverage ratio did not meet its minimum 5.00 to 1.00 ratio. As a result, the Company amended its Credit Facility on March 15, 2019 to amend its financial covenant ratios. The revised covenants only extend to the Q4 2018 and Q1 2019 periods, and therefore, without any additional changes, the Company would likely exceed the maximum leverage ratio covenant and/or not meet the minimum interest coverage ratio beyond the waiver periods, in which case the lenders would have the ability to demand repayment of the outstanding debt at such time. Accordingly, the outstanding balance of $142.7 million is presented as a current liability as of December 31, 2018 based on the guidance in ASC 470, Debt. Additionally, under ASC 205, Presentation of Financial Statements, the Company is required to consider and has evaluated whether there is substantial doubt that it has the ability to meet its obligations within one year from the financial statement issuance date. This assessment also includes the Company’s consideration of any management plans to alleviate such doubts. As described above, the probable inability of the Company to meet its current covenant obligations beyond the covenant waiver periods casts substantial doubt on the Company’s ability to meet its obligations within one year from the financial statement issuance date. The Company is in the process of negotiating changes to its debt structure with its existing lenders, which, based on discussions with lenders to-date and review of proposed negotiated conditions and financial covenants, the Company believes will be successfully completed in Q2 2019. At December 31, 2018, the Company had $6.0 million of unused availability under the Credit Agreement and $0.7 million of letters of credit which have not been drawn upon. The outstanding revolving credit facility - noncurrent was $0.0 million and $128.4 million as of December 31, 2018 and 2017, respectively, and the revolving credit facility - current was $142.7 million and $0.0 million as of December 31, 2018 and 2017, respectively. The Company had unamortized deferred financing fees associated with the Credit Facility of $0.7 million and $0.4 million as of December 31, 2018 and 2017. On February 22, 2016, the Company entered into a Revolving Credit Facility (the “Facility”) with Bank of America N.A. to support ongoing working capital needs of the Company's operations in China. The Facility includes a revolving commitment amount of $5.0 million whereby maturity dates vary based on each individual drawdown. Outstanding borrowings under the Facility are guaranteed by the Company’s assets. Borrowings and repayments are made in renminbi, the official Chinese currency. The applicable interest rate is 110% of the People’s Bank of China’s base rate. The terms of the Facility include limitations on use of funds for working capital purposes as well as customary representations and warranties made by the Company. At December 31, 2018, the Company had $4.5 million of unused availability under the Facility.

Revolving Credit Facility and Going Concern

The Company entered into a Credit Agreement, dated as of August 2, 2010, subsequently amended most recently as of March 15, 2019, among the Company, the lenders party thereto and Bank of America, N.A., as Administrative Agent (the “Credit Agreement”). The Credit Agreement includes a revolving commitment amount of $175 million and $160 million in the aggregate through September 25, 2019 and September 25, 2020, respectively. The Credit Agreement also provides the Company the right to increase the aggregate commitment amount by an additional $50 million. Outstanding borrowings under the revolving credit facility are guaranteed by the Company’s material domestic subsidiaries, as defined in the Credit Agreement. The Company’s obligations under the Credit Agreement and such domestic subsidiaries’ guaranty obligations are secured by substantially all of their respective assets. The ranges of applicable rates charged for interest on outstanding loans and letters of credit are 50-225 basis point spread for loans based on the base rate and 150-325 basis point spread for letter of credit fees and loans based on the Eurodollar rate.

The most recent amendment (i) modifies the definition of the term "Consolidated EBITDA" as used in the covenant calculations, (ii) increases the maximum leverage ratio to which the Company is subject for the trailing twelve month periods ended December 31, 2018 and ending March 31, 2019, respectively, and (iii) decreases the minimum interest coverage ratio to which the Company is subject for the trailing twelve month periods ended December 31, 2018 and ending March 31, 2019, respectively. The Company is also currently in the process of refinancing its debt. Please see Note 20 for further on events and circumstances occurring subsequent the balance sheet date.

The previous amendment to the Credit Agreement, dated as of September 28, 2018, extended the maturity date from September 25, 2019 to September 25, 2020 and adjusted the applicable rate spreads charged for interest on outstanding loans and letters of credit. Additional modifications were subsequently superseded by the most recent amendment, dated as of March 15, 2019.

The terms of the Credit Agreement include various covenants, including covenants that require the Company to maintain a maximum leverage ratio and a minimum interest coverage ratio. The most recent amendment to the Credit Agreement modified the maximum leverage ratio from 3.50 to 1.00 to 4.50 to 1.00 for the trailing twelve months ended December 31, 2018, and from 3.00 to 1.00 to 4.75 to 1.00 for the trailing twelve months ended March 31, 2019. The maximum leverage ratio is 3.00 to 1.00 for the trailing twelve months ending June 30, 2019 and each period thereafter. The most recent amendment to the Credit Agreement also modified the minimum interest coverage ratio from 5.00 to 1.00 to 4.00 to 1.00 for the trailing twelve months ended December 31, 2018, and from 5.00 to 1.00 to 3.50 to 1.00 for the trailing twelve months ending March 31, 2019. The minimum interest coverage ratio is 5.00 to 1.00 for the trailing twelve months ending June 30, 2019 and each period thereafter.

At December 31, 2018, the Company's leverage ratio exceeded its 3.50 to 1.00 ratio and the Company's interest coverage ratio did not meet its minimum 5.00 to 1.00 ratio. As a result, the Company amended its Credit Facility on March 15, 2019 to amend its financial covenant ratios. The revised covenants only extend to the Q4 2018 and Q1 2019 periods, and therefore, without any additional changes, the Company would likely exceed the maximum leverage ratio covenant and/or not meet the minimum interest coverage ratio beyond the waiver periods, in which case the lenders would have the ability to demand repayment of the outstanding debt at such time. Accordingly, the outstanding balance of $142.7 million is presented as a current liability as of December 31, 2018 based on the guidance in ASC 470, Debt.

Additionally, under ASC 205, Presentation of Financial Statements, the Company is required to consider and has evaluated whether there is substantial doubt that it has the ability to meet its obligations within one year from the financial statement issuance date. This assessment also includes the Company’s consideration of any management plans to alleviate such doubts. As described above, the probable inability of the Company to meet its current covenant obligations beyond the covenant waiver periods casts substantial doubt on the Company’s ability to meet its obligations within one year from the financial statement issuance date.

The Company is in the process of negotiating changes to its debt structure with its existing lenders, which, based on discussions with lenders to-date and review of proposed negotiated conditions and financial covenants, the Company believes will be successfully completed in Q2 2019.

At December 31, 2018, the Company had $6.0 million of unused availability under the Credit Agreement and $0.7 million of letters of credit which have not been drawn upon. The outstanding revolving credit facility - noncurrent was $0.0 million and $128.4 million as of December 31, 2018 and 2017, respectively, and the revolving credit facility - current was $142.7 million and $0.0 million as of December 31, 2018 and 2017, respectively. The Company had unamortized deferred financing fees associated with the Credit Facility of $0.7 million and $0.4 million as of December 31, 2018 and 2017.

On February 22, 2016, the Company entered into a Revolving Credit Facility (the “Facility”) with Bank of America N.A. to support ongoing working capital needs of the Company's operations in China. The Facility includes a revolving commitment amount of $5.0 million whereby maturity dates vary based on each individual drawdown. Outstanding borrowings under the Facility are guaranteed by the Company’s assets. Borrowings and repayments are made in renminbi, the official Chinese currency. The applicable interest rate is 110% of the People’s Bank of China’s base rate. The terms of the Facility include limitations on use of funds for working capital purposes as well as customary representations and warranties made by the Company. At December 31, 2018, the Company had $4.5 million of unused availability under the Facility.