Summary of Significant Accounting Policies - Impact on the Balance Sheets From Adoption of New Accounting Standard (Details) - USD ($)	Apr. 30, 2018	Feb. 01, 2018	Jan. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract receivables, current	$ 923,274	$ 507,000	$ 223,791
Contract receivables, noncurrent	686,658	468,000	0
Deferred revenues	7,301,408	8,793,000	9,481,807
Accumulated deficit	(71,253,816)	(70,685,000)	(72,125,065)
Balances without adoption of ASC 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract receivables, current	560,000		224,000
Contract receivables, noncurrent	207,000		0
Deferred revenues	7,496,000		9,482,000
Accumulated deficit	(72,292,000)		$ (72,125,000)
Adjustments due to ASC 606 | ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract receivables, current	363,000	283,000
Contract receivables, noncurrent	480,000	468,000
Deferred revenues	(195,000)	(689,000)
Accumulated deficit	$ 1,038,000	$ 1,440,000