Consolidated Balance Sheets (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	5,000,000	5,000,000
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	42,790,000	35,346,000
Common stock, shares outstanding	39,464,000	32,146,000
Treasury stock, shares	3,326,000	3,200,000
Series A, issued and outstanding - 0 and 127
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares issued	0	127,000
Preferred stock, shares outstanding	0	127,000
Series B, issued and outstanding - 357 and 355
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares issued	357,000	355,000
Preferred stock, shares outstanding	357,000	355,000
Series A-1, issued and outstanding - 4,210 and 0 (including 4,085 shares declared as a stock dividend, not yet distributed)
Preferred stock, par value	$ 0.0001
Preferred stock, shares issued	4,210,000	0
Dividend declared, not yet distributed	4,085,000	0
Preferred stock, shares outstanding	4,210,000	0