v3.8.0.1

Summary of Significant Accounting Policies (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2018
Summary of Significant Accounting Policies |
Schedule of cash and cash equivalents and restricted cash | The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets to the amounts shown in the consolidated statements of cash flows as of March 31, 2018 and 2017 (in thousands):
|  | March 31, |  | March 31, |
|  | 2018 |  | 2017 |
Cash and cash equivalents |  | $ | 175,187 |  | $ | 58,595 |
Restricted cash |  |  | 1,329 |  |  | 1,546 |
Total cash, cash equivalents and restricted cash |  | $ | 176,516 |  | $ | 60,141 |
Changes in warranty reserve | During the three months ended March 31, 2018 and 2017, changes in the warranty reserve consisted of the following (in thousands):
|  | Three Months Ended |
|  | March 31, |
|  | 2018 |  | 2017 |
Accrued warranty reserve, beginning of period |  | $ | 4,916 |  | $ | 4,033 |
Reserve provided |  |  | 998 |  |  | 416 |
Payments |  |  | (1,291) |  |  | (959) |
Accrued warranty reserve, end of period |  | $ | 4,623 |  | $ | 3,490 |
Reconciliation of net income and weighted average shares outstanding for the calculation of basic and diluted earnings per share | The following table represents a reconciliation of the net income (loss) and weighted average shares outstanding for the calculation of basic and diluted earnings (loss) per share for the three months ended March 31, 2018 and 2017 (in thousands, except per share amounts):
|  | Three Months Ended |
|  | March 31, |
|  | 2018 |  | 2017 |
Numerator: |  |  |  |  |  |  |
Basic net income (loss) |  | $ | (2,343) |  | $ | 2,439 |
Effect of dilutive securities |  |  | — |  |  | — |
Diluted net income (loss) |  | $ | (2,343) |  | $ | 2,439 |
Denominator: |  |  |  |  |  |  |
Basic weighted average shares outstanding |  |  | 22,570 |  |  | 22,471 |
Effect of dilutive securities |  |  | — |  |  | 247 |
Diluted weighted average shares outstanding |  |  | 22,570 |  |  | 22,718 |
Basic earnings (loss) per share |  | $ | (0.10) |  | $ | 0.11 |
Diluted earnings (loss) per share |  | $ | (0.10) |  | $ | 0.11 |

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of cash and cash equivalents. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
Name: | us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration