Organization and Summary of Significant Accounting Policies - Textual (Details)					3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) numberOfCustomer	Jul. 27, 2020 USD ($)	Dec. 31, 2019 USD ($) numberOfCustomer	Dec. 31, 2015 USD ($)	Sep. 30, 2020 USD ($) numberOfCustomer shares	Sep. 30, 2019 USD ($) numberOfCustomer shares	Sep. 30, 2020 USD ($) numberOfResearchOrganization numberOfSegment numberOfCustomer shares	Sep. 30, 2019 USD ($) numberOfCustomer shares
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of research organizations | numberOfResearchOrganization							2
Number of operating segments | numberOfSegment							1
Revenues					$ 416,361	$ 454,507	$ 1,256,004	$ 1,247,908
Allowance for doubtful accounts receivable	$ 0		$ 0		0		0
Income tax benefit, valuation allowance reversal	1,001,233				1,001,233		1,001,233
Cash received from income tax refund							500,616	506,866
Unrecognized tax benefits	0				0		0
Provision for income taxes					0	$ 0	0	$ 900
Deferred tax assets, net	$ 9,400,000		$ 7,200,000		$ 9,400,000		$ 9,400,000
Deferred tax assets, valuation allowance coverage, percent	100.00%		100.00%		100.00%		100.00%
Antidilutive securities excluded from computation of earnings per share (in shares) | shares					4,650,390	4,006,390	4,650,390	4,006,390
Tax Year 2019
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 | numberOfCustomer					8	5	12	8
Customer Concentration Risk | Accounts Receivable
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, number of customers | numberOfCustomer	10		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 | numberOfCustomer					3		6
Concentration risk, percentage					40.60%	77.00%	48.50%	73.60%
Revenues					$ 169,000	$ 351,000	$ 609,000	$ 918,000
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 | numberOfCustomer	5		4
Concentration risk, percentage	64.90%		69.50%
Accounts receivable	$ 613,000		$ 388,000		$ 613,000		$ 613,000
Danisco USA | 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					92.90%	91.60%	96.20%	77.10%
Contract Research Organizations | Customer Concentration Risk | Accounts Payable
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage	74.40%		74.90%
Accounts payable	$ 727,000		$ 706,000		$ 727,000		$ 727,000