Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Accounts receivable, allowance	$ 3,979	$ 3,382
Accumulated Amortization of Intangible and other assets	$ 8,466	$ 7,930
Preferred stock, par value (USD per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Series A Preferred Convertible Stock
Preferred stock, par value (USD per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	1	1
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Voting Common Stock
Common stock, par value (USD per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	1,900,000,000	1,500,000,000
Common stock, shares issued (in shares)	1,451,737,853	1,446,783,645
Common stock, shares outstanding (in shares)	1,451,737,853	1,446,783,645
Nonvoting Common Stock
Common stock, par value (USD per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	0	400,000,000
Common stock, shares issued (in shares)	0	0
Common stock, shares outstanding (in shares)	0	0