Summary of Significant Accounting Policies - Additional Information (Detail)
|
12 Months Ended |
|
Dec. 31, 2015
USD ($)
Segment
|
Dec. 31, 2014
USD ($)
|
Dec. 31, 2013
USD ($)
|
| Accounting Policies [Line Items] |
|
|
|
| Original maturity of highly liquid investments |
three months
|
|
|
| Impairment of investment |
$ 0
|
|
|
| Allowance for bad debt |
240,000
|
$ 458,000
|
|
| Depreciation Expense |
$ 5,055,000
|
1,555,000
|
$ 1,339,000
|
| Number of operating segment | Segment |
3
|
|
|
| Impairment charges |
$ 0
|
0
|
0
|
| Cash Insured amount |
250,000
|
|
|
| Uninsured cash balances |
4,120,000
|
5,814,000
|
|
| Research and development costs |
5,829,000
|
2,093,000
|
2,308,000
|
| Advertising costs |
$ 953,000
|
$ 455,000
|
$ 616,000
|
| Lifting Equipment and ASV Segment [Member] | Maximum [Member] |
|
|
|
| Accounting Policies [Line Items] |
|
|
|
| Reporting unit, percentage of fair value in excess of carrying amount |
10.00%
|
|
|
| Equipment Distribution [Member] | Minimum [Member] |
|
|
|
| Accounting Policies [Line Items] |
|
|
|
| Reporting unit, percentage of fair value in excess of carrying amount |
10.00%
|
|
|
| Goodwill Impairment [Member] |
|
|
|
| Accounting Policies [Line Items] |
|
|
|
| Number of operating segment | Segment |
3
|
|
|