Summary of Significant Accounting Policies, Fair Value of Financial Instruments Through Inventories (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Adjusted Cost	$ 28,308,000
Unrealized Gains	2,000
Unrealized Losses	(23,000)
Fair Value	28,287,000
Cash and Cash Equivalents	9,370,000
Short-Term Investments	13,573,000
Long-Term Investments	5,344,000
Cash, Cash Equivalents and Marketable Securities [Abstract]
Money market funds and debt securities	9,400,000	$ 2,000,000
Cash and cash equivalents held in foreign bank accounts	507,000	507,000
Accounts Receivable [Abstract]
Allowance for doubtful accounts	34,000	27,000
Inventories [Abstract]
Raw materials	4,483,000	2,385,000
Work-in-process	462,000	793,000
Finished goods	2,290,000	1,407,000
Inventories	7,235,043	$ 4,584,844
Cash [Member]
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Adjusted Cost	3,774,000
Unrealized Gains	0
Unrealized Losses	0
Fair Value	3,774,000
Cash and Cash Equivalents	3,774,000
Short-Term Investments	0
Long-Term Investments	0
Level 1 [Member]
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Adjusted Cost	3,198,000
Unrealized Gains	0
Unrealized Losses	0
Fair Value	3,198,000
Cash and Cash Equivalents	3,198,000
Short-Term Investments	0
Long-Term Investments	0
Level 1 [Member] | Money Market Funds [Member]
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Adjusted Cost	3,198,000
Unrealized Gains	0
Unrealized Losses	0
Fair Value	3,198,000
Cash and Cash Equivalents	3,198,000
Short-Term Investments	0
Long-Term Investments	0
Level 2 [Member]
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Adjusted Cost	21,336,000
Unrealized Gains	2,000
Unrealized Losses	(23,000)
Fair Value	21,315,000
Cash and Cash Equivalents	2,398,000
Short-Term Investments	13,573,000
Long-Term Investments	5,344,000
Level 2 [Member] | Certificates of Deposit [Member]
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Adjusted Cost	2,159,000
Unrealized Gains	2,000
Unrealized Losses	0
Fair Value	2,161,000
Cash and Cash Equivalents	0
Short-Term Investments	719,000
Long-Term Investments	1,442,000
Level 2 [Member] | Commercial Paper [Member]
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Adjusted Cost	5,985,000
Unrealized Gains	0
Unrealized Losses	(4,000)
Fair Value	5,981,000
Cash and Cash Equivalents	2,398,000
Short-Term Investments	3,583,000
Long-Term Investments	0
Level 2 [Member] | Corporate Notes/Bonds [Member]
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Adjusted Cost	9,689,000
Unrealized Gains	0
Unrealized Losses	(14,000)
Fair Value	9,675,000
Cash and Cash Equivalents	0
Short-Term Investments	7,274,000
Long-Term Investments	2,401,000
Level 2 [Member] | U.S. Government Agencies [Member]
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Adjusted Cost	3,503,000
Unrealized Gains	0
Unrealized Losses	(5,000)
Fair Value	3,498,000
Cash and Cash Equivalents	0
Short-Term Investments	1,997,000
Long-Term Investments	$ 1,501,000