Acquisitions - Schedule of Unaudited Pro Forma Information (Detail) - Smadex - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Pro-Forma:
Total revenue	$ 74,575	$ 336,503	$ 219,400	$ 467,050
Net income (loss)	$ 2,215	$ 157,428	$ 5,841	$ 163,540
Basic and diluted earnings per share:
Net income per share, basic	$ 0.02	$ 1.74	$ 0.07	$ 1.81
Net income per share, diluted	$ 0.02	$ 1.71	$ 0.06	$ 1.78
Weighted average common shares outstanding, basic	88,852,342	90,517,492	89,371,750	90,370,679
Weighted average common shares outstanding, diluted	90,122,425	92,161,108	90,574,663	91,985,946