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Restatement of Previously Issued Consolidated Financial Statements - Consolidated Statements of Cash Flows Impact (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] |  |  |  |  |  |  |  |  |  |
Net cash used in 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 provided by financing activities | (8,151) | (19,761) | (1,190) | (33,010) | 14,861 | (30,083) | 10,568 | (36,784) | 68,504 | 67,671
Increase in cash | (1,950) | (6,950) | (2,292) | (8,010) | (2,292) | (6,835) | (2,292) | (6,153) | 1,884 | 255
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
Previously Reported |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |
Net cash used in operating activities |  | 9,995 |  |  |  |  |  |  | (23,049) | (15,685)
Net cash used in investing activities |  | (214) |  |  |  |  |  |  | (43,570) | (51,713)
Net cash provided by financing activities |  | (16,731) |  |  |  |  |  |  | 68,503 | 67,653
Increase in cash |  |  |  |  |  |  |  |  | 1,884 | 255
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

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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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- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the 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. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. + References No definition available. + Details
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- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3521-108585 + Details
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