The Company generates its revenues primarily from performance obligations completed under contracts with customers in three main market sectors: defense, energy and precision industrial. The period over which the Company performs is generally less than one year. The Company invoices and receives related payments based upon performance progress not less frequently than monthly.

Revenue is recognized over-time or at a point-in-time given the terms and conditions of the related contracts. The Company utilizes an inputs methodology based on estimated labor hours to measure performance progress. This model best depicts the transfer of control to the customer.

The Company’s contract portfolio is comprised of fixed-price contracts and provide for product type sales only. The following table presents net sales on a disaggregated basis by market and contract type:

Net Sales by market	Defense		Energy		Industrial		Totals
Year ended March 31, 2019	$	14,036,638	$	2,403,732	$	262,188	$	16,702,558
Year ended March 31, 2018	$	15,744,494	$	2,251,536	$	703,964	$	18,792,994

Net Sales by contract type		Over-time				Point-in-time				Totals
Year ended March 31, 2019		$	15,771,213			$	931,345			$	16,702,558

As of March 31, 2019, the Company had $12.6 million of remaining performance obligations, of which $9.3 million were less than 50% complete. The Company expects to recognize all of its remaining performance obligations as revenue within the next 24 months.

We have been dependent in each year on a small number of customers who generate a significant portion of our business, and these customers change from year to year. The following table sets forth information as to net sales from customers who accounted for more than 10% of our net sales for the years ended:

	March 31, 2019					March 31, 2018
Customer	Amount		Percent			Amount			Percent
A	$	5,332,515		32	%		$	5,462,718		29	%
B	$	3,223,967		19	%		$	*		*	%
C	$	3,196,625		19	%		$	4,978,432		27	%

our Consolidated Balance Sheet, contract assets and contract liabilities are reported in a net position on a contract-by-contract basis at the end of each reporting period. In fiscal 2019, we recognized revenue of $0.9 million related to our contract liabilities at April 1, 2018. At March 31, 2019 contract assets consisted of the following:

Contract assets		Unbilled				Progress payments				Total
March 31, 2019		$	9,324,361			$	(4,933,529	)		$	4,390,832