Commitments and Contingencies - Narrative (Details) - USD ($)		3 Months Ended		6 Months Ended
	Feb. 06, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Other Commitments [Line Items]
Rent expense		$ 300,000	$ 300,000	$ 600,000	$ 600,000
Purchase commitments related to inventory		300,000		300,000		$ 400,000
Accrued litigation expense		2,605,000		2,605,000		$ 3,200,000
Reversal of accrued litigation expense		600,000		600,000
Statutory damages sought per violation of TCPA | Eric B Fromer Chiropractic Inc Class Action [Member]
Other Commitments [Line Items]
Damages sought per violation	$ 500
Treble damages sought per violation of TCPA | Eric B Fromer Chiropractic Inc Class Action [Member]
Other Commitments [Line Items]
Damages sought per violation	$ 1,500
Indemnification Agreement
Other Commitments [Line Items]
Costs to defend lawsuits or settle claims				0
Costs accrued to defend lawsuits		$ 0		$ 0