Guarantor and Non-Guarantor Financial Statements - Narrative (Details)  | 
3 Months Ended | |
|---|---|---|
| 
 Jun. 30, 2018  
USD ($)  
business 
 | 
 Sep. 28, 2016  
USD ($) 
 | 
|
| Condensed Financial Statements, Captions [Line Items] | ||
| Number of wholly-owned subsidiaries | business | 4 | |
| Convertible notes | ||
| Condensed Financial Statements, Captions [Line Items] | ||
| Debt face amount | $ | $ 5,700,000 | $ 16,000,000 | 
| Interest rate | 8.75% | 
| X | ||||||||||
- Definition Number Of Wholly Owned Subsidiaries No definition available. 
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| X | ||||||||||
- Definition 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. No definition available. 
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| X | ||||||||||
- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Details 
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