2. Significant Customers (Details 1)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Accounts Receivable
Cardinal Health, Inc.	34.00%	31.00%
McKesson Corporation	31.00%	29.00%
AmerisourceBergen Drug Corporation	24.00%	27.00%
Total	89.00%	87.00%