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v3.21.1

Transition period (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
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Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2018
Income Statement [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 92,671 | $ 88,562 | $ 72,350 | $ 64,527 | $ 74,712 | $ 80,760 | $ 67,615 | $ 59,764 | $ 66,141 | $ 78,571 | $ 63,889 | $ 59,055 | $ 65,920 | $ 318,110 | $ 282,851 | $ 267,435
Cost of sales |  |  |  |  |  |  |  |  | 25,650 |  |  |  | 25,712 | 111,912 | 101,728 | 104,694
Gross profit | 58,600 | 57,119 | 47,138 | 43,341 | 48,064 | 52,520 | 43,348 | 37,191 | 40,491 | 46,919 | 38,969 | 36,645 | 40,208 | 206,198 | 181,123 | 162,741
Selling, general, and administrative expenses |  |  |  |  |  |  |  |  | 37,324 |  |  |  | 36,234 | 194,157 | 157,155 | 136,579
Restructuring expense (income) |  |  |  |  |  |  |  |  | 22,176 |  |  |  | 0 | 2,641 | (5,982) | 0
Operating income (loss) |  |  |  |  |  |  |  |  | (19,009) |  |  |  | 3,974 | 9,400 | 29,950 | 26,162
Other expense, net |  |  |  |  |  |  |  |  | (315) |  |  |  | (888) | (1,620) | 426 | (390)
Interest expense, net |  |  |  |  |  |  |  |  | (1,849) |  |  |  | (1,963) | (4,090) | (6,307) | (7,816)
Income (loss) before provision for income taxes |  |  |  |  |  |  |  |  | (21,173) |  |  |  | 1,123 | 3,690 | 24,069 | 17,956
Income tax benefit (provision) |  |  |  |  |  |  |  |  | 3,259 |  |  |  | (433) | 2,542 | (6,185) | (2,431)
Net income (loss) | $ (24) | $ 4,297 | $ 447 | $ 1,512 | $ (341) | $ 8,002 | $ 6,517 | $ 3,706 | (17,914) | $ 9,672 | $ 3,915 | $ 1,248 | 690 | 6,232 | 17,884 | 15,525
Comprehensive income (loss) |  |  |  |  |  |  |  |  | $ (17,914) |  |  |  | $ 690 | $ 6,232 | $ 17,884 | $ 15,525
Basic (in USD per share) | $ (0.00) | $ 0.09 | $ 0.01 | $ 0.03 | $ (0.01) | $ 0.16 | $ 0.13 | $ 0.08 | $ (0.37) | $ 0.20 | $ 0.08 | $ 0.03 | $ 0.01 | $ 0.13 | $ 0.37 | $ 0.33
Diluted (in USD per share) | $ (0.00) | $ 0.08 | $ 0.01 | $ 0.03 | $ (0.01) | $ 0.16 | $ 0.13 | $ 0.07 | $ (0.37) | $ 0.20 | $ 0.08 | $ 0.03 | $ 0.01 | $ 0.12 | $ 0.35 | $ 0.32
Basic (in shares) |  |  |  |  |  |  |  |  | 48,022,926 |  |  |  | 46,435,560 | 49,377,410 | 48,498,813 | 46,828,798
Diluted (in shares) |  |  |  |  |  |  |  |  | 48,022,926 |  |  |  | 49,302,771 | 51,994,145 | 50,817,143 | 49,268,616
Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | $ (24) | $ 4,297 | $ 447 | $ 1,512 | $ (341) | $ 8,002 | $ 6,517 | $ 3,706 | $ (17,914) | $ 9,672 | $ 3,915 | $ 1,248 | $ 690 | $ 6,232 | $ 17,884 | $ 15,525
Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 7,544 |  |  |  | 4,288 | 25,179 | 22,843 | 17,861
Restructuring loss |  |  |  |  |  |  |  |  | 22,176 |  |  |  | 0 | 2,641 | (5,982) | 0
Stock-based compensation expense |  |  |  |  |  |  |  |  | 3,683 |  |  |  | 3,640 | 19,682 | 15,488 | 16,821
Amortization of debt issuance costs and discount on debt |  |  |  |  |  |  |  |  | 190 |  |  |  | 199 | 847 | 747 | 792
Deferred income taxes |  |  |  |  |  |  |  |  | (3,433) |  |  |  | 735 | (8,584) | 2,443 | (939)
Other, net |  |  |  |  |  |  |  |  | 242 |  |  |  | 142 | 383 | 873 | 476
Changes in operating assets and liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  |  |  |  |  | 4,215 |  |  |  | 12,771 | (10,529) | 2,504 | 7,649
Inventories |  |  |  |  |  |  |  |  | 2,561 |  |  |  | 951 | (10,937) | (435) | 16,338
Prepaid expenses and other assets |  |  |  |  |  |  |  |  | (1,732) |  |  |  | (1,498) | (9,659) | (6,500) | (8,484)
Accounts payable and accrued expenses |  |  |  |  |  |  |  |  | (6,021) |  |  |  | (16,891) | 17,472 | 5,962 | (10,251)
Other liabilities |  |  |  |  |  |  |  |  | (3,295) |  |  |  | 3 | (3,252) | (11,514) | (206)
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 8,216 |  |  |  | 5,030 | 29,475 | 44,313 | 55,582
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of property and equipment |  |  |  |  |  |  |  |  | (3,400) |  |  |  | (2,667) | (6,474) | (9,422) | (8,872)
Net cash used in investing activities |  |  |  |  |  |  |  |  | (3,400) |  |  |  | (2,667) | (6,474) | (35,345) | (8,872)
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from revolving line of credit |  |  |  |  |  |  |  |  | 0 |  |  |  | 2,000 | 20,000 | 0 | 2,000
Repayment of revolving line of credit |  |  |  |  |  |  |  |  | 0 |  |  |  | (2,000) | (20,000) | 0 | (2,000)
Repayment of long-term debt |  |  |  |  |  |  |  |  | (2,063) |  |  |  | (2,063) | (11,756) | (9,488) | (8,250)
Cash received from issuance of common stock |  |  |  |  |  |  |  |  | 115 |  |  |  | 212 | 1,503 | 1,488 | 3,176
Other, net |  |  |  |  |  |  |  |  | (199) |  |  |  | (97) | (813) | (771) | (490)
Net cash used in financing activities |  |  |  |  |  |  |  |  | (2,147) |  |  |  | (1,948) | (11,400) | (16,675) | (5,564)
Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  | 2,669 |  |  |  | 415 | 11,601 | (7,707) | 41,146
Cash and cash equivalents - beginning of period |  |  |  | $ 46,167 |  |  |  | $ 53,874 | 51,205 |  |  | $ 10,474 | 10,059 | 46,167 | 53,874 | 10,059
Cash and cash equivalents - end of period | $ 57,768 |  |  |  | $ 46,167 |  |  |  | $ 53,874 | $ 51,205 |  |  | $ 10,474 | $ 57,768 | $ 46,167 | $ 51,205

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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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- Definition Amount of cash inflow (outflow) from financing activities classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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