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Significant Accounting Policies - Additional Information (Detail) (USD $)
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12 Months Ended |
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Dec. 31, 2013
Segment
Customer
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Dec. 31, 2012
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Dec. 31, 2011
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| Significant Accounting Policies [Line Items] |
|
|
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| Allowance for doubtful accounts |
$ 618,000.0 |
$ 1,100,000 |
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| Obsolete or slow-moving inventory |
400,000 |
700,000 |
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| Number of operating segment |
1 |
|
|
| Goodwill |
1,867,000 |
0 |
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| Other intangibles, net |
480,000 |
0 |
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| Amortization expense for other intangible assets |
0 |
200,000 |
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| Acquisition-related costs |
2,000,000 |
|
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| Postage and handling costs |
500,000 |
500,000 |
100,000 |
| Minimum Percentage of income Tax examination likelihood of tax benefits being realized upon ultimate resolution settlement |
50.00% |
|
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| Antidilutive securities excluded from computation of earnings per share amount |
7,012,000 |
2,173,000 |
1,262,000 |
| Number of major customers |
3 |
|
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| Probability of change in control assumed |
15.00% |
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| Interest income, net non-cash credits |
$ 2,000,000 |
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Customer 1
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| Significant Accounting Policies [Line Items] |
|
|
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| Revenue from major customers as percentage of total revenues |
21.00% |
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Customer 2
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| Significant Accounting Policies [Line Items] |
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| Revenue from major customers as percentage of total revenues |
12.00% |
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Customer 3
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| Significant Accounting Policies [Line Items] |
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| Revenue from major customers as percentage of total revenues |
6.00% |
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Accounts Receivable
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| Significant Accounting Policies [Line Items] |
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| Number of major customers |
2 |
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| Number of financing companies |
2 |
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Accounts Receivable | Financing Company 1
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|
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| Significant Accounting Policies [Line Items] |
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|
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| Concentration of risk percentage |
24.00% |
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Accounts Receivable | Financing Company 2
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| Significant Accounting Policies [Line Items] |
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| Concentration of risk percentage |
14.00% |
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Accounts Receivable | Customer 1
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| Significant Accounting Policies [Line Items] |
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| Concentration of risk percentage |
4.00% |
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Accounts Receivable | Customer 2
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| Significant Accounting Policies [Line Items] |
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| Concentration of risk percentage |
2.00% |
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Supplier Concentration Risk | Single Supplier
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| Significant Accounting Policies [Line Items] |
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| Concentration of risk percentage |
30.00% |
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Minimum
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| Significant Accounting Policies [Line Items] |
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| Property Plant And Equipment, estimated useful lives |
3 years |
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Maximum
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| Significant Accounting Policies [Line Items] |
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| Property Plant And Equipment, estimated useful lives |
20 years |
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| Amortization period of other intangible assets |
12 years |
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