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PREPAID EXPENSES AND OTHER CURRENT ASSETS (Tables)
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
PREPAID EXPENSES AND OTHER CURRENT ASSETS    
Schedule of Prepaid expenses and other current assets

Prepaid expenses and other current assets consists of the following (in thousands):

​

​

​

​

​

​

​

​

​

March 31, 

​

December 31, 

​

​

2021

​

2020

Receivable for warrants exercised

​

$

12,357

​

$

—

Prepaid insurance

​

​

2,948

​

​

121

Prepaid operating expenses

​

​

1,015

​

​

68

Prepaid dues and subscriptions

​

​

883

​

​

189

Prepaid taxes

​

​

474

​

​

—

Vendor prepayments

​

​

473

​

​

—

Prepaid rent

​

​

155

​

​

118

Deferred cost of goods sold

​

​

—

​

​

454

Other

​

​

352

​

​

26

Total prepaid expenses and other current assets

​

$

18,657

​

$

976

Prepaid expenses and other current assets consists of the following (in thousands):

​

​

​

​

​

​

​

​

​

December 31, 

​

​

2020

    

2019

Deferred cost of goods sold

​

$

454

​

$

262

Prepaid operating expenses

​

​

68

​

​

585

Prepaid dues and subscriptions

​

​

189

​

​

503

Prepaid insurance

​

​

121

​

​

45

Prepaid rent

​

​

118

​

​

11

Other

​

​

26

​

​

482

Total prepaid expenses and other current assets

​

$

976

​

$

1,888