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Nature of Business and Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2020
Accounting Policies [Abstract]  
Schedules of Concentration of Risk
Concentration of customers
The following customers accounted for 10% or more of total net revenue for the years ended December 31, 2020, 2019 and 2018:
Year Ended December 31,
Customers202020192018
%%%
A33%34%31%
B34%33%32%
C27%27%28%
Concentration of suppliers
The following suppliers accounted for 10% of more of inventory purchases for the years ended December 31, 2020, 2019 and 2018:
Year Ended December 31,
Suppliers202020192018
$$$
A17,429 8,142 8,310 
B3,756 1,755 3,833 
C2,603 11,218 *
*Represents less than 10% of inventory purchases for the years ended December 31, 2020, 2019 and 2018.
Summary of Inventories
Inventory is composed of the following at December 31:
20202019
Raw Materials & Supplies$3,389 $624 
Work-in-process9,949 6,198 
Finished Goods6,359 4,874 
Inventory Reserve(2,254)(384)
Total Inventories$17,443 $11,312 
Intangible Assets with Finite Useful Lives, Amortized Over Estimated Useful Lives
Intangible assets with finite useful lives are amortized over the estimated useful lives as follows:
Estimated
Useful Lives
Licenses15 years
BELBUCA license and distribution rights10 years
Symproic license and distribution rights12 years
Black Scholes Options-Pricing Model, Assumptions
In applying the Black-Scholes options-pricing model, assumptions are as follows:
202020192018
Expected price volatility
59%-61.76%
61.66%-64.10%
60.34%-68.77%
Risk-free interest rate
0.25%-1.68%
1.36%-2.66%
2.05%-3.00%
Weighted average expected life in years6 years6 years6 years
Dividend yield———
Fair Value, Assets Measured on Recurring and Nonrecurring Basis The following table summarizes the cash and cash equivalents measured at fair value on a recurring basis as of December 31, 2020:
Level 1Level 2Level 3Balance at December 31, 2020
Cash and cash equivalents$111,584 — — $111,584