Organization and Summary of Significant Accounting Policies - Textual (Details)		3 Months Ended		12 Months Ended
	Dec. 31, 2015 USD ($)	Mar. 31, 2020 USD ($) segment customer shares	Mar. 31, 2019 USD ($) customer shares	Dec. 31, 2019 USD ($) customer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of operating segments | segment		1
Revenues		$ 315,372	$ 402,527
Allowance for doubtful accounts receivable		0		$ 0
Income tax benefit, valuation allowance reversal		1,001,233
Cash received from income tax refund		0	6,249
Unrecognized tax benefits		0
Provision for income taxes		0	$ 900
Deferred tax assets, net		$ 9,600,000		$ 7,200,000
Deferred tax assets, valuation allowance coverage, percent		100.00%		100.00%
Antidilutive securities excluded from computation of earnings per share (in shares) | shares		4,663,390	4,541,890
Tax Year 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash received from income tax refund		$ 500,000
Customer Concentration Risk | Revenue
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, number of customers | customer		5	6
Customer Concentration Risk | Accounts Receivable
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, number of customers | customer				5
Outside of the United States | Customer Concentration Risk | Revenue
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, number of customers | customer		3
Concentration risk, percentage		58.00%	69.70%
Revenues		$ 183,000	$ 281,000
Outside of the United States | Customer Concentration Risk | Accounts Receivable
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, number of customers | customer		8		4
Concentration risk, percentage		72.90%		69.50%
Accounts receivable		$ 378,000		$ 388,000
DuPont Danisco | Industrial Technology Business
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Proceeds from sales of business	$ 75,000,000
Contract Research Organizations | Customer Concentration Risk
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage		100.00%	68.10%
Contract Research Organizations | Customer Concentration Risk | Accounts Payable
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage		91.20%		74.90%
Accounts payable		$ 596,000		$ 706,000