Amount, after accumulated amortization, of debt discount.

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Amount of debt discount to be amortized within one year or within the normal operating cycle, if longer.

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Amount of debt discount to be amortized after one year or the normal operating cycle, if longer.

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Amount, after accumulated amortization, of debt issuance costs classified as current. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Fair Value Measurement - Carrying Amounts and Fair Values of Long-Term Debt Obligations (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Current portion of long term debt	$ 3,256	$ 3,335	$ 3,238	$ 3,229	$ 9,102	$ 3,217	$ 3,208	$ 3,199
Long-term debt	153,128	$ 154,950	$ 154,758	$ 155,572	154,656	$ 161,340	$ 162,145	$ 162,951
Term loan and security agreement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	156,400
Secured Debt \| Term loan and security agreement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	156,384				163,758
Fair Value	157,983				161,759
Deferred financing cost, current	500				600
Original issue discount, current	600				600
Debt instrument discount	1,800
Current portion of long term debt	3,300
Deferred financing cost, noncurrent	1,200				1,700
Debt discount, noncurrent	1,300				$ 1,800
Long-term debt	$ 153,100