Customer Advances	9 Months Ended
Dec. 31, 2018
Notes
Customer Advances	4.Customer Advances In April 2017, we received approximately $581,000 from three significant customers as advances against future product sales and inventory purchases. During the three months and nine months ended December 31, 2018, we shipped and recognized revenue on the sale of product to this customer in the approximate amount of $0 and $33,000, respectively. During the three months and nine months ended December 31, 2017, we shipped and recognized revenue on the sale of product to this customer in the approximate amount of $97,000 and $248,000, respectively During the nine months ended December 31, 2017, we received approximately $$660,000 and $145,000 from two customers which cash was retained by us in order to purchase certain raw material inventory on their behalf. We purchased raw materials on behalf of these two customers resulting in an available balance of approximately $243,000 as of December 31, 2018 and March 31, 2018, which is included in Customer Advances in our balance sheet.

Customer Advances

9 Months Ended

Dec. 31, 2018

4.Customer Advances

In April 2017, we received approximately $581,000 from three significant customers as advances against future product sales and inventory purchases. During the three months and nine months ended December 31, 2018, we shipped and recognized revenue on the sale of product to this customer in the approximate amount of $0 and $33,000, respectively. During the three months and nine months ended December 31, 2017, we shipped and recognized revenue on the sale of product to this customer in the approximate amount of $97,000 and $248,000, respectively

During the nine months ended December 31, 2017, we received approximately $$660,000 and $145,000 from two customers which cash was retained by us in order to purchase certain raw material inventory on their behalf. We purchased raw materials on behalf of these two customers resulting in an available balance of approximately $243,000 as of December 31, 2018 and March 31, 2018, which is included in Customer Advances in our balance sheet.