Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Class A Voting Common Stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	24,945,594	24,645,825
Common stock, shares outstanding (in shares)	24,945,594	24,645,825
Series A-1 Convertible Participating Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares issued (in shares)	100,328	91,784
Preferred stock, shares outstanding (in shares)	100,328	91,784

Face amount or stated value per share of common stock.

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