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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2019
Income Tax Disclosure [Abstract] |
Schedule of Income before Income Tax, Domestic and Foreign | For the years ended December 31, 2019, 2018 and 2017, income before income taxes is broken out between U.S. and foreign-sourced operations and consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2019 |  | 2018 |  | 2017
Domestic | ​ | $ | (37,277) | ​ | $ | 21,084 | ​ | $ | 14,531
Foreign | ​ |  | 39,470 | ​ |  | 28,435 | ​ |  | 21,350
Total | ​ | $ | 2,193 | ​ | $ | 49,519 | ​ | $ | 35,881
Schedule of Components of Income Tax Expense (Benefit) | The components of the provision for income taxes for the years ended December 31, 2019, 2018 and 2017, consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2019 |  | 2018 |  | 2017
Current expense (benefit): |  | ​ |  |  | ​ |  |  | ​ |
Federal | ​ | $ | 479 | ​ | $ | (1,132) | ​ | $ | 3,849
State | ​ |  | 662 | ​ |  | 582 | ​ |  | 645
Foreign | ​ |  | 8,037 | ​ |  | 6,000 | ​ |  | 5,168
Total current expense | ​ |  | 9,178 | ​ |  | 5,450 | ​ |  | 9,662
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred expense (benefit): | ​ |  |  | ​ |  |  | ​ |  |
Federal | ​ |  | (8,111) | ​ |  | 4,400 | ​ |  | (314)
State | ​ |  | (3,523) | ​ |  | (667) | ​ |  | (216)
Foreign | ​ |  | (802) | ​ |  | (1,681) | ​ |  | (774)
Total deferred (benefit) expense | ​ |  | (12,436) | ​ |  | 2,052 | ​ |  | (1,304)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total income tax expense (benefit) | ​ | $ | (3,258) | ​ | $ | 7,502 | ​ | $ | 8,358
Schedule of Effective Income Tax Rate Reconciliation | The difference between the income tax expense reported and amounts computed by applying the statutory federal rate of 21.0% to pretax income for years ended December 31, 2019 and 2018, and 35% for the year ended December 31, 2017, consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2019 |  | 2018 |  | 2017
Computed federal income tax expense at applicable statutory rate | ​ | $ | 461 | ​ | $ | 10,399 | ​ | $ | 12,559
State income taxes | ​ |  | (2,241) | ​ |  | (59) | ​ |  | 279
Tax credits | ​ |  | (1,567) | ​ |  | (1,734) | ​ |  | (1,377)
Foreign tax rate differential | ​ |  | (1,536) | ​ |  | (1,361) | ​ |  | (3,329)
Uncertain tax positions | ​ |  | (794) | ​ |  | 267 | ​ |  | (19)
Deferred compensation insurance assets | ​ |  | (503) | ​ |  | 186 | ​ |  | (479)
Transaction-related expenses | ​ |  | 154 | ​ |  | 223 | ​ |  | 90
U.S. transition tax | ​ |  | — | ​ |  | (3,271) | ​ |  | 10,612
TCJA remeasurement of deferred taxes | ​ |  | — | ​ |  | (71) | ​ |  | (8,383)
Stock-based payments | ​ |  | (1,654) | ​ |  | (4,278) | ​ |  | (2,264)
Bargain purchase gain | ​ |  | — | ​ |  | — | ​ |  | (1,570)
In-process research and development | ​ |  | — | ​ |  | — | ​ |  | 1,486
Net GILTI | ​ |  | 1,861 | ​ |  | 347 | ​ |  | —
Foreign withholding tax | ​ |  | 638 | ​ |  | 5,590 | ​ |  | —
Other — including the effect of graduated rates | ​ |  | 1,923 | ​ |  | 1,264 | ​ |  | 753
Total income tax expense (benefit) | ​ | $ | (3,258) | ​ | $ | 7,502 | ​ | $ | 8,358
Schedule of Deferred Tax Assets and Liabilities | Deferred income tax assets and liabilities at December 31, 2019 and 2018, consisted of the following temporary differences and carry-forward items (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2019 |  | 2018
Deferred income tax assets: |  | ​ |  |  | ​ |
Allowance for uncollectible accounts receivable | ​ | $ | 693 | ​ | $ | 606
Accrued compensation expense | ​ |  | 9,244 | ​ |  | 7,414
Inventory differences | ​ |  | 2,207 | ​ |  | 1,269
Net operating loss carryforwards | ​ |  | 21,187 | ​ |  | 20,226
Deferred revenue | ​ |  | 552 | ​ |  | 46
Stock-based compensation expense | ​ |  | 4,672 | ​ |  | 2,833
Operating lease assets | ​ | ​ | 16,838 | ​ | ​ | —
Federal R&D Tax Credits | ​ | ​ | 1,376 | ​ | ​ | —
Other | ​ |  | 6,189 | ​ |  | 9,243
Total deferred income tax assets | ​ |  | 62,958 | ​ |  | 41,637
​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred income tax liabilities: | ​ |  |  | ​ |  |
Prepaid expenses | ​ |  | (1,128) | ​ |  | (1,142)
Property and equipment | ​ |  | (21,242) | ​ |  | (20,045)
Intangible assets | ​ |  | (53,933) | ​ |  | (58,883)
Foreign withholding tax | ​ |  | (5,240) | ​ |  | (5,590)
Operating lease liabilities | ​ | ​ | (15,847) | ​ | ​ | —
Other | ​ |  | (2,372) | ​ |  | (4,350)
Total deferred income tax liabilities | ​ |  | (99,762) | ​ |  | (90,010)
Valuation allowance | ​ |  | (4,644) | ​ |  | (4,989)
Net deferred income tax liabilities | ​ | $ | (41,448) | ​ | $ | (53,362)
​ | ​ | ​ | ​ | ​ | ​ | ​
Reported as: | ​ |  |  | ​ |  |
Deferred income tax assets | ​ | $ | 3,788 | ​ | $ | 3,001
Deferred income tax liabilities | ​ |  | (45,236) | ​ |  | (56,363)
Net deferred income tax liabilities | ​ | $ | (41,448) | ​ | $ | (53,362)
Summary of Income Tax Contingencies | A reconciliation of the beginning and ending amount of liabilities associated with uncertain tax benefits for the years ended December 31, 2019, 2018 and 2017, consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2019 |  | 2018 |  | 2017
Unrecognized tax benefits, opening balance | ​ | $ | 2,947 | ​ | $ | 2,749 | ​ | $ | 2,549
Gross increases (decreases) in tax positions taken in a prior year | ​ |  | (244) | ​ |  | 35 | ​ |  | 80
Gross increases in tax positions taken in the current year | ​ |  | 229 | ​ |  | 586 | ​ |  | 403
Lapse of applicable statute of limitations | ​ |  | (771) | ​ |  | (423) | ​ |  | (283)
Unrecognized tax benefits, ending balance | ​ | $ | 2,161 | ​ | $ | 2,947 | ​ | $ | 2,749

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- Definition Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319 + Details
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