Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 5,896,600	$ 3,126,200
Trade receivables, net	1,041,100us-gaap_AccountsReceivableNetCurrent	1,182,300us-gaap_AccountsReceivableNetCurrent
Inventories, net	2,689,700us-gaap_InventoryNet	3,211,200us-gaap_InventoryNet
Income taxes receivable	3,700us-gaap_IncomeTaxesReceivable	0us-gaap_IncomeTaxesReceivable
Prepaid expenses	346,000us-gaap_PrepaidExpenseCurrent	269,200us-gaap_PrepaidExpenseCurrent
Total current assets	9,977,100us-gaap_AssetsCurrent	7,788,900us-gaap_AssetsCurrent
Property, plant and equipment, net	400,800us-gaap_PropertyPlantAndEquipmentNet	518,200us-gaap_PropertyPlantAndEquipmentNet
Other assets	51,000us-gaap_OtherAssetsNoncurrent	51,000us-gaap_OtherAssetsNoncurrent
Total assets	10,428,900us-gaap_Assets	8,358,100us-gaap_Assets
Current liabilities:
Accounts payable	616,300us-gaap_AccountsPayableCurrent	860,900us-gaap_AccountsPayableCurrent
Accrued payroll and benefits	665,900	553,300
Accrued property taxes	34,200	33,400
Total current liabilities	1,316,400us-gaap_LiabilitiesCurrent	1,447,600us-gaap_LiabilitiesCurrent
Total liabilities	1,316,400us-gaap_Liabilities	1,447,600us-gaap_Liabilities
Commitments and contingencies
Shareholders’ equity:
Common stock; $0.10 par value, authorized 50,000,000 shares; issued and outstanding 11,549,789 shares (2014) and 11,446,800 shares (2013)	1,155,000us-gaap_CommonStockValue	1,144,700us-gaap_CommonStockValue
Capital in excess of par	5,713,800	5,615,500
Retained earnings	2,243,700	150,300
Total shareholders’ equity	9,112,500us-gaap_StockholdersEquity	6,910,500us-gaap_StockholdersEquity
Total liabilities and shareholders’ equity	$ 10,428,900	$ 8,358,100

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Subparagraph a

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682