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Accrued Expenses and Other Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2017
Accrued Expenses and Other Liabilities |
Schedule of accrued expenses and other current liabilities |
|  | December 31, |
|  | 2017 |  | 2016 |
|  | (in thousands) |
Payroll and related benefits |  | $ | 32,996 |  | $ | 18,780 |
Warranty |  | 6,532 |  | 4,217 |
Interest |  | 4,430 |  | — |
Professional fees |  | 3,942 |  | 1,827 |
Merger consideration payable |  | 2,662 |  | — |
Installation |  | 2,271 |  | 1,382 |
Sales, use, and other taxes |  | 2,144 |  | 1,282 |
Restructuring liability |  | 1,520 |  | 1,796 |
Other |  | 3,842 |  | 3,917 |
Total |  | $ | 60,339 |  | $ | 33,201 |

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