​

September 30, 

December 31, 

($in thousands)

​

2021

​

2020

​

​

(Unaudited)

​

​

​

​

​

​

​

​

​

​

Accrued expenses:

​

​

Accrued employee compensation

$

2,411

$

2,041

Research and development - license fees

​

629

​

—

Accrued royalties payable

​

4,496

​

2,682

Accrued coupon and rebates

​

12,449

​

12,869

Reserve for product returns

​

3,652

​

2,580

Other

​

2,411

​

1,326

Total accrued expenses

​

$

26,048

​

$

21,498