CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) - $ / shares	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Stock issued for cash, net (in dollars per share)						$ 4.02
Minimum [Member]
Stock issued for cash, net (in dollars per share)	$ 5.53	$ 6.02	$ 5.05	$ 3.00	$ 3.45
Maximum [Member]
Stock issued for cash, net (in dollars per share)	$ 6.28	$ 6.49	$ 5.42	$ 4.89	$ 4.13