3. Cash and Investment Held in Trust Account (Details) - US Treasury Securities [Member] - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Available-for-sale marketable securities carrying value	$ 46,678,852	$ 46,342,279
Available-for-sale marketable securities gross unrealized holding gain	246,264	27,179
Available-for-sale marketable securities fair value	$ 46,925,116	$ 46,369,458