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Summary of significant accounting policies (Tables) | 12 Months Ended
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Mar. 31, 2020
Accounting Policies [Abstract] |
Schedule of Concentrations of Risk | During the years ended March 31, 2020, December 31, 2018 and 2017, and the three month transition period ended March 31, 2019, two customers individually accounted for greater than 10% of the Company’s net sales as disclosed below:
| Year ended March 31, |  | Three months ended March 31, (transition period) |  | Year ended December 31,
| 2020 |  | 2019 |  | 2018 |  | 2017
Walmart | 31 | % |  | 36 | % |  | 30 | % |  | 29 | %
Target | 22 | % |  | 17 | % |  | 21 | % |  | 25 | %
Customers that individually accounted for greater than 10% of the Company’s accounts receivable at the end of the periods are as presented:
| March 31, 2020 |  | March 31, 2019 |  | December 31, 2018
Target | 22 | % |  | 19 | % |  | 27 | %
Walmart | 20 | % |  | 27 | % |  | 20 | %
Schedule of Useful Lives by Major Asset Class | Useful lives by major asset class are as follows:
|  | Estimated useful lives
Machinery, equipment and software |  | 3-5 years
Leasehold improvements |  | 5 years
Furniture and fixtures |  | 2-5 years
Store fixtures |  | 2-3 years
Net Sales in United States and Outside of United States | During the years ended March 31, 2020, December 31, 2018 and 2017, and the transition period for the three months ended March 31, 2019, net sales in the United States and outside of the United States were as follows (in thousands):
| Year ended March 31, |  | Three months ended March 31, (transition period) |  | Year ended December 31,
| 2020 |  | 2019 |  | 2018 |  | 2017
U.S. | $ | 255,284 |  |  | $ | 59,797 |  |  | $ | 241,159 |  |  | $ | 243,299 |
International | 27,567 |  |  | 6,344 |  |  | 26,276 |  |  | 26,589 |
Total net sales | $ | 282,851 |  |  | $ | 66,141 |  |  | $ | 267,435 |  |  | $ | 269,888 |
Property and Equipment in United States and Outside of United States | As of March 31, 2020, March 31, 2019, and December 31, 2018, the Company had property and equipment in the United States and outside of the United States as follows (in thousands):
| March 31, 2020 |  | March 31, 2019 |  | December 31, 2018
U.S. | $ | 16,845 |  |  | $ | 15,491 |  |  | $ | 21,236 |
International | 326 |  |  | 515 |  |  | 568 |
Total property and equipment, net | $ | 17,171 |  |  | $ | 16,006 |  |  | $ | 21,804 |
Reconciliation of Sales Allowances | A reconciliation of the beginning and ending amounts of the reserve for sales adjustments for the years ended March 31, 2020, December 31, 2018 and 2017, and the transition period for the three months ended March 31, 2019 is as follows (in thousands):
Balance as of December 31, 2016 | 11,927 |
Charges | 25,680 |
Deductions | (29,149 | )
Balance as of December 31, 2017 | $ | 8,458 |
Charges | 26,971 |
Deductions | (27,655 | )
Balance as of December 31, 2018 | 7,774 |
Charges | 6,787 |
Deductions | (8,016 | )
Balance as of March 31, 2019 | 6,545 |
Charges | 29,576 |
Deductions | (28,508 | )
Balance as of March 31, 2020 | $ | 7,613 |

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