Note 8 - Concentrations

12 Months Ended

Mar. 31, 2018

Notes to Financial Statements

Concentration Risk Disclosure [Text Block]

NOTE

8.

CONCENTRATIONS

     The following table summarizes customers comprising

10%

or more of revenue for the

three

most recent fiscal years:
 

	% of Revenue for Year Ended March 31
	2018		2017		2016
Customer A		19%		22%		23%
Customer B		18%		20%		20%

 
     These

two

customers accounted for

51%

of our accounts receivable as of

March 

31,

2018

and

40%

as of

March 

31,

2017.

We believe the receivable balances from these customers do

not

represent a significant credit risk based on past collection experience.

     Revenue by geographic region was as follows:
 

	Year Ended March 31
	2018		2017		2016
United States	$	14,911,258	$	13,600,236	$	12,392,053
Europe, the Middle East, and Africa		10,133,134		9,612,883		11,392,046
Asia-Pacific		4,607,811		4,200,934		3,113,484
Rest of World		211,678		912,143		819,695
Total Revenue	$	29,863,881	$	28,326,196	$	27,717,278