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Selected Quarterly Financial Data (Unaudited) - Effect of Restatement on Consolidated Statement of Cash Flow (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |
Accrued expenses | $ 2,432 | $ 1,891 | $ 3,242 | $ 3,041 | $ 8,867 | $ 6,099 | $ 6,029 | $ 15,709 | $ 1,085 | $ 5,096
Prepaid expenses and other assets | (1,624) | (207) | 1,238 | (1,261) | (1,359) | (2,443) | (2,284) | (12,893) | 2,126 | (3,224)
Net cash provided by operating activities | 8,097 | 13,910 | 1,322 | 24,511 | (13,542) | 24,313 | (7,695) | 32,282 | (22,815) | (15,094)
Net cash used in investing activities | (1,896) | (1,099) | (2,424) | 489 | (3,611) | (1,065) | (5,165) | (1,651) | (43,805) | (52,322)
Net cash used in financing activities | (8,151) | (19,761) | (1,190) | (33,010) | 14,861 | (30,083) | 10,568 | (36,784) | 68,504 | 67,671
Decrease in cash |  | (6,950) |  |  |  |  |  |  |  |
Cash at beginning of the year | 2,292 | 8,445 | 2,292 | 8,445 | 2,292 | 8,445 | 2,292 | 8,445 | 6,561 | 6,306
Cash at end of the year | 342 | 1,495 | 0 | 435 | 0 | 1,610 |  | 2,292 | 8,445 | 6,561
Other noncurrent liabilities | $ 121 | 98 | $ 894 | (1,011) | $ 821 | (1,028) | $ (5,260) | 1,601 | 8,107 | (232)
Previously Reported |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |
Net cash provided by operating activities |  | 9,995 |  |  |  |  |  |  | (23,049) | (15,685)
Net cash used in investing activities |  | (214) |  |  |  |  |  |  | (43,570) | (51,713)
Net cash used in financing activities |  | (16,731) |  |  |  |  |  |  | 68,503 | 67,653
Decrease in cash |  | (6,950) |  |  |  |  |  |  |  |
Cash at beginning of the year |  | 8,445 |  | 8,445 |  | 8,445 |  | 8,445 | 6,561 | 6,306
Cash at end of the year |  | 1,495 |  |  |  |  |  |  | 8,445 | $ 6,561
Restatement Adjustments and Reclassifications |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |
Net cash provided by operating activities |  | 3,915 |  |  |  |  |  |  |  |
Net cash used in investing activities |  | (885) |  |  |  |  |  |  |  |
Net cash used in financing activities |  | (3,030) |  |  |  |  |  |  |  |
Decrease in cash |  | 0 |  |  |  |  |  |  |  |
Cash at beginning of the year |  | 0 |  | $ 0 |  | $ 0 |  | $ 0 |  |
Cash at end of the year |  | $ 0 |  |  |  |  |  |  | $ 0 |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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