Summary of Significant Accounting Policies - Narrative (Details)	3 Months Ended								12 Months Ended
	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) product	Dec. 31, 2018 USD ($)	Jan. 01, 2019 USD ($)	Dec. 31, 2017 USD ($)
Summary of Significant Accounting Policies Details [Line Items]
Product acquisition cost useful life									10 years
Goodwill	$ 491,000				$ 470,000				$ 491,000	$ 470,000		$ 471,000
Allowance for doubtful accounts	2,208,000				2,636,000				2,208,000	2,636,000
Allowance for doubtful accounts related to one customer	1,700,000								$ 1,700,000
Percentage of net sales for royalty									40.00%
Royalties	377,000				222,000				$ 377,000	222,000
Royalty expense									1,400,000	2,200,000
Company product sales, net	15,967,000	$ 18,466,000	$ 18,341,000	$ 13,122,000	16,777,000	$ 18,294,000	$ 16,249,000	$ 14,545,000	65,896,000	65,865,000
Net revenues									156,301,000	158,278,000
Assets	206,905,000				190,892,000				206,905,000	190,892,000
Foreign currency loss									1,500,000
Unrecognized tax benefits	0								0
Unrecognized tax benefits that would impact effective tax rate	0								0
Cost of revenues									42,373,000	$ 43,480,000
Right-of-use asset	2,453,000								2,453,000
Operating lease liability	2,633,000								$ 2,633,000
Accounting Standards Update 2016-02
Summary of Significant Accounting Policies Details [Line Items]
Right-of-use asset											$ 1,900,000
Operating lease liability											$ 2,000,000.0
Net sales revenue
Summary of Significant Accounting Policies Details [Line Items]
Concentration risk									41.00%	54.00%
Accounts receivable
Summary of Significant Accounting Policies Details [Line Items]
Concentration risk									31.00%	68.00%
Customer one | Sales
Summary of Significant Accounting Policies Details [Line Items]
Company product sales, net									$ 17,600,000	$ 21,200,000
Customer one | Accounts receivable
Summary of Significant Accounting Policies Details [Line Items]
Concentration risk									25.00%	30.00%
Customer two | Sales
Summary of Significant Accounting Policies Details [Line Items]
Company product sales, net									$ 9,600,000	$ 7,300,000
Customer two | Accounts receivable
Summary of Significant Accounting Policies Details [Line Items]
Concentration risk									6.00%	19.00%
Customer three | Sales
Summary of Significant Accounting Policies Details [Line Items]
Company product sales, net										$ 6,900,000
Customer three | Accounts receivable
Summary of Significant Accounting Policies Details [Line Items]
Concentration risk										19.00%
Maximum
Summary of Significant Accounting Policies Details [Line Items]
Intangible assets useful life									15 years
Minimum
Summary of Significant Accounting Policies Details [Line Items]
Intangible assets useful life									10 years
Net Of SRA Balance
Summary of Significant Accounting Policies Details [Line Items]
Accounts receivable net	30,500,000				18,100,000				$ 30,500,000	$ 18,100,000
US
Summary of Significant Accounting Policies Details [Line Items]
Products which the company pays royalties | product									4
Wholesalers, Distributors, National Retail Chains | Maximum
Summary of Significant Accounting Policies Details [Line Items]
Terms of customer credit									90 days
Wholesalers, Distributors, National Retail Chains | Minimum
Summary of Significant Accounting Policies Details [Line Items]
Terms of customer credit									60 days
Diflorasone Diacetate Ointment USP 0.05% | Net sales revenue | Product Concentration Risk
Summary of Significant Accounting Policies Details [Line Items]
Concentration risk									15.00%
Shipping and Handling
Summary of Significant Accounting Policies Details [Line Items]
Cost of revenues									$ 1,800,000	2,100,000
Domestic
Summary of Significant Accounting Policies Details [Line Items]
Net revenues									48,400,000	45,600,000
Assets	154,300,000				132,700,000				154,300,000	132,700,000
Foreign
Summary of Significant Accounting Policies Details [Line Items]
Net revenues									17,500,000	20,200,000
Assets	52,600,000				$ 58,200,000				52,600,000	$ 58,200,000
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 | The 2023 Term Loans
Summary of Significant Accounting Policies Details [Line Items]
Debt instrument, fair value disclosure	23,000,000.0								23,000,000.0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 | Series B Senior Unsecured Convertible Notes
Summary of Significant Accounting Policies Details [Line Items]
Debt instrument, fair value disclosure	28,900,000								28,900,000
Reported Value Measurement | Fair Value, Inputs, Level 2
Summary of Significant Accounting Policies Details [Line Items]
Debt instrument, fair value disclosure	53,100,000								53,100,000
Reported Value Measurement | Fair Value, Inputs, Level 3
Summary of Significant Accounting Policies Details [Line Items]
Fair value of the derivative liability	$ 6,800,000								$ 6,800,000