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Redeemable non-controlling interest
 12 Months Ended
Dec. 31, 2020
Noncontrolling Interest [Abstract]  
Redeemable non-controlling interest Redeemable non-controlling interestIn connection with the acquisition of Tecnidex, the Company concurrently entered into the Option Agreement with the Seller related to the remaining 25% equity interest. The Option Agreement permits the residual interest to be "put" by the Seller to the Company, or to allow the Company to "call" the residual interest gradually over time as outlined in the agreement. The Seller's ownership of Tecnidex represents a NCI to the Company, which is classified outside of stockholders' equity as the option of the Seller is redeemable. As of December 31, 2020 the carrying amount of the NCI was recorded at its redemption value of
$8.4 million in the consolidated balance sheet. Changes in the redemption value of the NCI are included as an adjustment to Additional paid-in capital on the balance sheet.

The following table summarizes the changes to the Company's Redeemable non-controlling interest.
(in thousands)Year Ended December 31,
2020		Year Ended December 31,
2019
Beginning balance$(7,701)$(8,263)
Net loss attributable to redeemable non-controlling interest394 678 
Adjustment of NCI to redemption value(1,139)(116)
Ending balance$(8,446)$(7,701)