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9. ACCRUED OTHER EXPENSES (Tables) | 12 Months Ended
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Dec. 31, 2020
Accrued Other Expenses |
Accrued other expenses |
|  | December 31, 2020 |  |  | December 31, 2019 |
Inventory purchases |  | $ | 1,458,850 |  |  | $ | - |
Payroll and related benefit costs |  |  | 853,402 |  |  |  | 151,473 |
Professional fees |  |  | 618,308 |  |  |  | 105,493 |
Royalty costs |  |  | 1,906,439 |  |  |  | 1,125,000 |
Contract liabilities* |  |  | 1,559,847 |  |  |  | 901,196 |
Sales and use tax |  |  | 183,264 |  |  |  | 148,836 |
Other |  |  | 884,953 |  |  |  | 234,473 |
Total accrued other expenses |  | $ | 7,465,063 |  |  | $ | 2,666,471 |
* Contract liabilities include sales allowances given to customers. A related inventory contract asset stemming from the sales return reserve of $366 thousand and $376 thousand is included within inventories on the accompanying consolidated balance sheets as of December 31, 2020 and 2019, respectively.

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- Definition Tabular disclosure of the (a) carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business (accounts payable); (b) other payables; and (c) accrued liabilities. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). An alternative caption includes accrued expenses. + References No definition available. + Details
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