Summary of Significant Accounting Policies (Details Textual) - USD ($)	1 Months Ended	12 Months Ended
	Nov. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jul. 31, 2012
Summary of Significant Accounting Policies (Textual)
Repurchase of common stock	$ 3,000,000
Stock repurchase plan expire date	Nov. 19, 2021
Cost of Goods Sold		$ 290,000	$ 4,700,000
Consumable asset write-down			256,000
Write-down of the obsolete consumable assets		63,000
Revenue recognized		56,000	394,000
Total amount of the contract					$ 4,700,000
Depreciation expense associated with property and equipment		355,000	1,200,000
Deposit at foreign financial institutions		1,500,000	1,200,000
Deposit at financial institutions amounts insured by FDIC and other		6,800,000	6,800,000
Research and development costs		122,000	962,000
Cost of goods sold for inventory write downs		$ 3,862,000	10,552,000
Outstanding exercisable shares		34,000
Accrued warranty reserve		$ 8,000	15,000
Cash and cash equivalents		11,241,000	11,544,000
Restricted cash		169,000	181,000
Cash, cash equivalents and restricted cash		11,410,000	11,725,000	$ 17,835,000
Supply of Material [Member]
Summary of Significant Accounting Policies (Textual)
Reduced inventory		310,000	310,000
Increased Costs of goods sold		310,000	310,000
Raw Materials [Member]
Summary of Significant Accounting Policies (Textual)
Reduced inventory			2,400,000
Increased Costs of goods sold			2,400,000
Crystals [Member]
Summary of Significant Accounting Policies (Textual)
Reduced inventory			451,000
Increased Costs of goods sold			451,000
Sales [Member]
Summary of Significant Accounting Policies (Textual)
Reduced inventory		6,000	97,000
Increased Costs of goods sold		$ 6,000	$ 97,000